Le Health Dictionary

A zoonosis. It is an acute, febrile, septicaemic disease caused by the Leptospira interrogans which has more than 200 serovars. The disease is characterised by a broad spectrum of clinical manifestations including fever, chills, headache, conjunctivitis and muscular pains. The disease may be subclinical in mild cases but jaundice and renal failure are observed in severe cases. Includes Weil’s Disease. Can result in an aseptic meningitis.... leptospirosis

An abnormal mucous discharge from the vagina... leucorrhoea

Blood cancer... leukaemia

A group of infections caused by parasites transmitted to humans by sand?ies.

Visceral leishmaniasis (kala-azar) A systemic infection caused by Leishmania donovani which occurs in tropical and subtropical Africa, Asia, the Mediterranean littoral (and some islands), and in tropical South America. Onset is frequently insidious; incubation period is 2–6 months. Enlargement of spleen and liver may be gross; fever, anaemia, and generalised lymphadenopathy are usually present. Diagnosis is usually made from a bone-marrow specimen, splenic-aspirate, or liver-biopsy specimen; amastigotes (Leishman-Donovan bodies) of L. donovani can be visualised. Several serological tests are of value in diagnosis.

Untreated, the infection is fatal within two years, in approximately 70 per cent of patients. Treatment traditionally involved sodium stibogluconate, but other chemotherapeutic agents (including allupurinol, ketoconazole, and immunotherapy) are now in use, the most recently used being liposomal amphotericin B. Although immunointact persons usually respond satisfactorily, they are likely to relapse if they have HIV infection (see AIDS/HIV).

Cutaneous leishmaniasis This form is caused by infection with L. tropica, L. major,

L. aethiopica, and other species. The disease is widely distributed in the Mediterranean region, Middle East, Asia, Africa, Central and South America, and the former Soviet Union. It is characterised by localised cutaneous ulcers

– usually situated on exposed areas of the body. Diagnosis is by demonstration of the causative organism in a skin biopsy-specimen; the leishmanin skin test is of value. Most patients respond to sodium stibogluconate (see above); local heat therapy is also used. Paromomycin cream has been successfully applied locally.

Mucocutaneous leishmaniasis This form is caused by L. braziliensis and rarely L. mexicana. It is present in Central and South America, particularly the Amazon basin, and characterised by highly destructive, ulcerative, granulomatous lesions of the skin and mucous membranes, especially involving the mucocutaneous junctions of the mouth, nasopharynx, genitalia, and rectum. Infection is usually via a super?cial skin lesion at the site of a sand?y bite. However, spread is by haematogenous routes (usually after several years) to a mucocutaneous location. Diagnosis and treatment are the same as for cutaneous leishmaniasis.... leishmaniasis

See Limón.... lemon

See Limoncillo.... lemongrass

A brownish or yellowish spot found on the skin, generally on the hands, arms or face often caused by exposure to sunlight... lentigo

A wound... lesion

Also known as Hansen’s disease, this is a chronic bacterial infection caused by Mycobacterium leprae affecting the skin, mucous membranes, and nerves. Infection is now almost con?ned to tropical and subtropical countries – mostly in Africa and India. There are two distinct (polarised) clinical forms: tuberculoid and lepromatous. The former usually takes a benign course and frequently burns out, whereas the latter is relentlessly progressive; between these two polar forms lies an intermediate/dimorphous group. Susceptibility may be increased by malnutrition. Nasal secretions (especially in lepromatous disease) are teeming with M. leprae and constitute the main source of infection; however, living in close proximity to an infected individual seems necessary for someone to contract the disease. M. leprae can also be transmitted in breast milk from an infected mother.

Only a small minority of those exposed to M. leprae develop the disease. The incubation period is 3–5 years or longer. The major clinical manifestations involve skin and nerves: the former range from depigmented, often anaesthetic areas, to massive nodules; nerve involvement ranges from localised nerve swelling(s) to extensive areas of anaesthesia. Advanced nerve destruction gives rise to severe deformities: foot-drop, wrist-drop, claw-foot, extensive ulceration of the extremities with loss of ?ngers and toes, and bone changes. Eye involvement can produce blindness. Laryngeal lesions produce hoarseness and more serious sequelae. The diagnosis is essentially a clinical one; however, skin-smears, histological features and the lepromin skin-test help to con?rm the diagnosis and enable the form of disease to be graded.

Although the World Health Organisation had originally hoped to eliminate leprosy worldwide by 2000, that has proved an unrealistic target. The reason is an absence of basic information. Doctors are unable to diagnose the disorder before a patient starts to show symptoms; meanwhile he or she may have already passed on the infection. Doctors do not know exactly how transmission occurs or how it infects humans – nor do they know at what point a carrier of the bacterium may infect others. The incidence of new infections is still more than 650,000 cases a year or about 4.5 cases per 10,000 people in those countries worst affected by the disease.

Treatment Introduction of the sulphone compound, dapsone, revolutionised management of the disease. More recently, rifampicin and clofazimine have been added as ?rst-line drugs for treatment. Second-line drugs include minocycline, o?oxacin and clarithromycin; a number of regimens incorporating several of these compounds (multi-drug regimens – introduced in 1982) are now widely used. A three-drug regime is recommended for multi-bacillary leprosy and a two-drug one for parcibacillary leprosy. Dapsone resistance is a major problem worldwide, but occurs less commonly when multi-drug regimens are used. Older compounds – ethionamide and prothionamide

– are no longer used because they are severely toxic to the liver. Corticosteroids are sometimes required in patients with ‘reversal reaction’. Supportive therapy includes physiotherapy; both plastic and orthopaedic surgery may be necessary in advanced stages of the disease. Improvement in socio-economic conditions, and widespread use of BCG vaccination are of value as preventive strategies. Early diagnosis and prompt institution of chemotherapy should prevent long-term complications.... leprosy

A white plaque on mucous membranes caused by overgrowth of the tissues. It is occasionally a pre-cancerous condition.... leukoplakia

Contact lenses are lenses worn in contact with the EYE, behind the eyelids and in front of the cornea. They may be worn for cosmetic, optical or therapeutic reasons. The commonest reason for wear is cosmetic, many short-sighted people preferring to wear contact lenses instead of glasses. Optical reasons for contact-lens wear include cataract surgery (usually unilateral extraction) and the considerable improvement in overall standard of vision experienced by very short-sighted people when wearing contact lenses instead of glasses. Therapeutic lenses are those used in the treatment of eye disease: ‘bandage lenses’ are used in certain corneal diseases; contact lenses can be soaked in a particular drug and then put on the eye so that the drug slowly leaks out on to the eye. Contact lenses may be hard, soft or gas permeable. Hard lenses are more optically accurate (because they are rigid), cheaper and more durable than soft. The main advantage of soft lenses is that they are more comfortable to wear. Gas-permeable lenses are so-called because they are more permeable to oxygen than other lenses, thus allowing more oxygen to reach the cornea.

Disposable lenses are soft lenses designed to be thrown away after a short period of continuous use; their popularity rests on the fact that they need not be cleaned. The instructions on use should be followed carefully because the risk of complications, such as corneal infection, are higher than with other types of contact lenses.

Contraindications to the use of contact lenses include a history of ATOPY, ‘dry eyes’, previous GLAUCOMA surgery and a person’s inability to cope with the management of lenses. The best way to determine whether contact lenses are suitable, however, may be to try them out. Good hygiene is essential for wearers so as to minimise the risk of infection, which may lead to a corneal abscess – a serious complication. Corneal abrasions are fairly common and, if a contact-lens wearer develops a red eye, the lens should be removed and the eye tested with ?uorescein dye to identify any abrasions. Appropriate treatment should be given and the lens not worn again until the abrasion or infection has cleared up.... contact lenses

A very complex fat found in various tissues of the body, but particularly in the brain and nerves, of which it forms a large part. It is also found in large quantities in the yolk of an egg.... lecithin

Lead and lead compounds are used in a variety of products including petrol additives (in the UK, lead-free petrol is now mandatory), piping (lead water pipes were once a common source of poisoning), weights, professional paints, dyes, ceramics, ammunition, homeopathic remedies, and ethnic cosmetic preparations. Lead compounds are toxic by ingestion, by inhalation and, rarely, by skin exposures. Metallic lead, if ingested, is absorbed if it remains in the gut. The absorption is greater in children, who may ingest lead from the paint on old cots

– although lead-containing paints are no longer used for items that children may be in contact with.

Acute poisonings are rare. Clinical features include metallic taste, abdominal pain, vomiting, diarrhoea, ANOREXIA, fatigue, muscle weakness and SHOCK. Neurological effects may include headache, drowsiness, CONVULSIONS and COMA. Inhalation results in severe respiratory-tract irritation and systemic symptoms as above.

Chronic poisonings cause gastrointestinal disturbances and constipation. Other effects are ANAEMIA, weakness, pallor, anorexia, insomnia, renal HYPERTENSION and mental fatigue. There may be a bluish ‘lead line’ on the gums, although this is rarely seen. Neuromuscular dysfunction may result in motor weakness and paralysis of the extensor muscles of the wrist and ankles. ENCEPHALOPATHY and nephropathy are severe effects. Chronic low-level exposures in children are linked with reduced intelligence and behavioural and learning disorders.

Treatment Management of patients who have been poisoned is supportive, with removal from source, gastric decontamination if required, and X-RAYS to monitor the passage of metallic lead through the gut if ingested. It is essential to ensure adequate hydration and renal function. Concentrations of lead in the blood should be monitored; where these are found to be toxic, chelation therapy should be started. Several CHELATING AGENTS are now available, such as DMSA (Meso-2,3dimercaptosuccinic acid), sodium calcium edetate (see EDTA) and PENICILLAMINE. (See also POISONS.)... lead poisoning

A blood-feeding annelid worm.... leech

Learning disability, previously called mental handicap, is a problem of markedly low intellectual functioning. In general, people with learning disability want to be seen as themselves, to learn new skills, to choose where to live, to have good health care, to have girlfriends or boyfriends, to make decisions about their lives, and to have enough money to live on. They may live at home with their families, or in small residential units with access to work and leisure and to other people in ordinary communities. Some people with learning disabilities, however, also have a MENTAL ILLNESS. Most can be treated as outpatients, but a few need more intensive inpatient treatment, and a very small minority with disturbed behaviour need secure (i.e. locked) settings.

In the United Kingdom, the 1993 Education Act refers to ‘learning diffculties’: generalised (severe or moderate), or speci?c (e.g. DYSLEXIA, dyspraxia [or APRAXIA], language disorder). The 1991 Social Security (Disability Living Allowance) Regulations use the term ‘severely mentally impaired’ if a person suffers from a state of arrested development or incomplete physical development of the brain which results in severe impairment of intelligence and social functioning. This is distinct from the consequences of DEMENTIA. Though ‘mental handicap’ is widely used, ‘learning disability’ is preferred by the Department of Health.

There is a distinction between impairment (a biological de?cit), disability (the functional consequence) and handicap (the social consequence).

People with profound learning disability are usually unable to communicate adequately and may be seriously movement-impaired. They are totally dependent on others for care and mobility. Those with moderate disability may achieve basic functional literacy (recognition of name, common signs) and numeracy (some understanding of money) but most have a life-long dependency for aspects of self-care (some fastenings for clothes, preparation of meals, menstrual hygiene, shaving) and need supervision for outdoor mobility.

Children with moderate learning disability develop at between half and three-quarters of the normal rate, and reach the standard of an average child of 8–11 years. They become independent for self-care and public transport unless they have associated disabilities. Most are capable of supervised or sheltered employment. Living independently and raising a family may be possible.

Occurrence Profound learning disability affects about 1 in 1,000; severe learning disability 3 in 1,000; and moderate learning disability requiring special service, 1 per cent. With improved health care, survival of people with profound or severe learning disability is increasing.

Causation Many children with profound or severe learning disability have a diagnosable biological brain disorder. Forty per cent have a chromosome disorder – see CHROMOSOMES (three quarters of whom have DOWN’S (DOWN) SYNDROME); a further 15 per cent have other genetic causes, brain malformations or recognisable syndromes. About 10 per cent suffered brain damage during pregnancy (e.g. from CYTOMEGALOVIRUS (CMV) infection) or from lack of oxygen during labour or delivery. A similar proportion suffer postnatal brain damage from head injury – accidental or otherwise – near-miss cot death or drowning, cardiac arrest, brain infection (ENCEPHALITIS or MENINGITIS), or in association with severe seizure disorders.

Explanations for moderate learning disability include Fragile X or other chromosome abnormalities in a tenth, neuro?bromatosis (see VON RECKLINGHAUSEN’S DISEASE), fetal alcohol syndrome and other causes of intra-uterine growth retardation. Genetic counselling should be considered for children with learning disability. Prenatal diagnosis is sometimes possible. In many children, especially those with mild or moderate disability, no known cause may be found.

Medical complications EPILEPSY affects 1 in 20 with moderate, 1 in 3 with severe and 2 in 3 with profound learning disability, although only 1 in 50 with Down’s syndrome is affected. One in 5 with severe or profound learning disability has CEREBRAL PALSY.

Psychological and psychiatric needs Over half of those with profound or severe – and many with moderate – learning disability show psychiatric or behavioural problems, especially in early years or adolescence. Symptoms may be atypical and hard to assess. Psychiatric disorders include autistic behaviour (see AUTISM) and SCHIZOPHRENIA. Emotional problems include anxiety, dependence and depression. Behavioural problems include tantrums, hyperactivity, self-injury, passivity, masturbation in public, and resistance to being shaved or helped with menstrual hygiene. There is greater vulnerability to abuse with its behavioural consequences.

Respite and care needs Respite care is arranged with link families for children or sta?ed family homes for adults where possible. Responsibility for care lies with social services departments which can advise also about bene?ts.

Education Special educational needs should be met in the least restrictive environment available to allow access to the national curriculum with appropriate modi?cation and support. For older children with learning disability, and for young children with severe or profound learning disability, this may be in a special day or boarding school. Other children can be provided for in mainstream schools with extra classroom support. The 1993 Education Act lays down stages of assessment and support up to a written statement of special educational needs with annual reviews.

Pupils with learning disability are entitled to remain at school until the age of 19, and most with severe or profound learning disability do so. Usually those with moderate learning disability move to further education after the age of 16.

Advice is available from the Mental Health Foundation, the British Institute of Learning Disabilities, MENCAP (Royal Society for Mentally Handicapped Children and Adults), and ENABLE (Scottish Society for the Mentally Handicapped).... learning disability

Infection by the Gram negative rod, Legionella pneumophila and other species of the Genus. Often presents as an atypical pneumonia. Outbreaks have been reported from various countries.... legionnaire’s disease

A benign tumour made up of unstriped or involuntary muscle ?bres.... leiomyoma

Lethargy, or lassitude, means a loss of energy. It is a common presenting complaint both to general practitioners and to hospital consultants. It may have a physical cause or a psychological cause; it may be the result of inadequate rest, environmental noise, boredom, insomnia or recent illness. Certain medicinal drugs can cause lethargy, the most common being beta blockers (see BETA-ADRENOCEPTOR-BLOCKING DRUGS) and DIURETICS, and drugs of abuse may also be a cause (see DEPENDENCE). The common psychosocial problems producing lethargy are DEPRESSION and anxiety.

If the patient with lethargy runs a fever, the di?erential diagnosis is that of a PUO (pyrexia of unknown origin). Many patients with fatigue can establish the onset of the symptom to a febrile illness even though they no longer run a fever. The lethargy that follows some viral infecions, such as HEPATITIS A and glandular fever (see MONONUCLEOSIS) is well recognised; MYALGIC ENCEPHALOMYELITIS (ME) or chronic fatigue syndrome is another disorder associated with lethargy and tiredness. Organic causes of lethargy include ANAEMIA, malnutrition and hypothyroidism (see THYROID GLAND, DISEASES OF). Some of these patients have a true depressive illness and their presentation and response to treatment is little di?erent from that of sufferers of any other depressive illness, URAEMIA, alcoholism and DIABETES MELLITUS.... lethargy

A white blood cell.... leucocyte

Any white area on the skin... leucoderma

A condition in which the polymorphonuclear LEUCOCYTES in the blood are increased in number. It occurs in many di?erent circumstances, and forms a valuable means of diagnosis in certain diseases; however, the condition may occur as a normal reaction in certain conditions (e.g. pregnancy, menstruation, and during muscular exercise). It is usually due to the presence of in?ammatory processes (see INFLAMMATION) – the increased number of leucocytes helping to destroy the invading bacteria. Thus, during many acute infective diseases, such as pneumonia, the number is greatly increased. In all suppurative conditions (where PUS is formed) there is also a leucocytosis, and if it seems that an ABSCESS is forming deep in the abdomen, or in some other site where it cannot be readily examined – as, for example, an abscess resulting from APPENDICITIS – the examination of a drop of blood gives a valuable aid in the diagnosis, and may be su?cient, in the absence of other signs, to point out the urgent need of an operation.... leucocytosis

A drug used to treat ASCARIASIS. Its main advantage seems to be in mass treatment, as one dose may prove e?ective. It is also being used in the treatment of a group of diseases of obscure origin, including CROHN’S DISEASE and RHEUMATOID ARTHRITIS. The drug is available in the UK with certain restrictions.... levamisole

A drug used in the treatment of PARKINSONISM. It is converted to DOPAMINE in the brain, correcting the de?ciency which causes the disorder. Levodopa is often given with carbidopa or benserazide, both dopamine decarboxylase inhibitors, to prevent its conversion to dopamine in the body before it reaches the brain. It may cause nausea, HYPOTENSION or cardiac DYSRHYTHMIA.... levodopa

A spectacle lens in which the upper part is shaped to assist distant vision and the lower part is for close work such as reading.... bifocal lens

Lemon balm tea is fragrant to drink and is a very effective tonic to calm nerves and anxiety. Cold lemon balm tea bags help relieve cold sores, or genital sores caused by the herpes simplex virus. Mix lemon balm leaves with valerian to treat anxiety, stress and insomnia. Lemon Balm contains several properties, which control herpes and also regulate the thyroid. Lemon balm when mixed with peppermint can calm an upset stomach, sooth the digestive track and reduce flatulence. Drink lemon balm tea if you suffer from nerve pain. Drinking lemon balm tea also helps strengthen memory and brain functions and also uplifts one’s mood.... lemon balm tea

A nodule in the skin occurring in LEPROSY.... leproma

A group, or genus, of spiral micro-organisms, normally found in rodents and other small mammals in which they cause no harm. When transmitted to humans by these animals, either directly or indirectly as through cows, they give rise to various forms of illness (see LEPTOSPIROSIS).... leptospira

A gene that produces a GENOTYPE which causes the death of an organism before that organism has reproduced – or which prevents it from reproducing. Lethal genes are usually RECESSIVE, so the organism will die only if both its ‘parents’ carry the gene. Should only one parent have the lethal gene, its consequences will be masked by the dominant ALLELE passed on by the normal parent.... lethal gene

One of the essential, or indispensable, AMINO ACIDS. They are so-called because they cannot be synthesised, or manufactured, in the body, and are therefore essential constituents of the diet.... leucine

A condition in which the number of LEUCOCYTES in the blood is greatly reduced – by, say, ANAEMIA or cancer. It is also a dangerous sign in severe SEPTICAEMIA.... leucopenia

See LEUKOPLAKIA.... leucoplakia

See PSYCHOSURGERY.... leucotomy

(1) Any muscle that raises the organ or structure into which it is inserted.

(2) A surgical instrument for raising depressed fragments of bone in a fracture, particularly a fracture of the skull.... levator

An orthopaedic procedure in which the length of a limb, usually a leg, is increased. The bone is surgically divided and slowly stretched in a special frame. The operation is usually done on people with unequal leg lengths as a result of injury or from PARALYSIS in childhood. Exceptionally, it may be done in both legs to help people of short stature.... limb lengthening

A condition in which the patient experiences unpleasant sensations, and occasionally involuntary movements, in the legs when at rest, especially at night. No pathological changes have been identi?ed. It is sometimes indicative of iron-de?ciency ANAEMIA, but in many cases the cause remains a mystery and the variety of cures o?ered are a testimony to this. Some anti-epileptic drugs are said to help (see EPILEPSY).... restless legs syndrome

The internal optical component of the eye responsible for focusing; also called the crystalline lens. It is situated behind the iris and is suspended on delicate fibres from the ciliary body. The lens is elastic, transparent, and slightly less convex on the front surface than on the back. Changing its curvature alters

the focus so that near or distant objects can be seen sharply (see accommodation). Opacification of the lens is called cataract. (See also lens dislocation.)... lens

A plastic prosthesis used to replace the removed opaque lens in cataract surgery.... lens implant

A protein that has a role in the regulation of fat storage by the body.... leptin

A progestogen drug used in some oral contraceptives.... levonorgestrel

See ovary, polycystic.... stein-leventhal syndrome

Willd.

Synonym: A. alba Willd.

Family: Mimosaceae.

Habitat: Native to West Indies; now occurring throughout India.

English: Cassie Flower, Cassie Absolute, Sweet Acacia.

Ayurvedic: Arimeda, Vitkhadira.

Unani: Vilaayati Kikar, Gandbabuul, Guyaa Babuul, Durgandh Khair.

Siddha/Tamil: Kastuurivel, Vedday- ala.

Action: Bark—astringent, demulcent, anthelmintic, antidysenteric, anti-inflammatory (used in stomatitis, ulcers, swollen gums, dental caries, bronchitis, skin diseases).

Ripe pods contain tannins and several polyphenolic compounds. Essential oil from pods—direct muscle relaxant, cardiac depressant and sedative.

Various plant parts are used in insanity, epilepsy, delirium and convulsions.

Family: Mimosaceae.

Habitat: Dry regions of the country, especially in Punjab, Rajasthan and Madhya Pradesh.

English: White Babul.

Ayurvedic: Arimeda, Arimedaka, Arimanja, Irimeda, Vitakhadir, Godhaa-skandha, Raamaka.

Unani: Kath Safed, Vilaayati Babuul, Guyaa Babuul.

Siddha/Tamil: Valval, Velvayalam.

Folk: Safed Babuul, Safed Kikar, Renvaa.

Action: Bark—bitter, demulcent and cooling; used in biliousness and bronchitis. Seeds—haemaggluti- nating activity has been reported. Leaves—antisyphilitic and antibacterial. Gum—demulcent.

EtOH (50%) extract of aerial parts— hypotensive and central nervous system depressant.

The rootbark contains leucophleol, leucophleoxol and leucoxol.... acacia leucophloea

(Linn.) Willd.

Family: Mimosaceae.

Habitat: All over India, from the plains up to 900 m in the Himalayas; also in the Andamans.

English: Siris tree, East Indian walnut.

Ayurvedic: Shirisha, Bhandi, Bhandila, Shitapushpa, Mridu- pushpa, Kapitana (bark—dusty black).

Unani: Siras.

Siddha/Tamil: Vaagei.

Action: Antiseptic, antibacterial, antiallergic, antidermatosis, antidysenteric. Bark—used in bronchitis; bark and seeds in piles; root in hemicrania; flowers in cough, bronchitis, tropical pulmonary eosinophilia, and asthma. Pod— antiprotozoal.

Along with other therapeutic applications, The Ayurvedic Pharmacopoeia of India indicates the use of stembark in rhinitis, sinusitis and migraine.

Analysis of the plant revealed the presence of flavonoids, triterpenoids and triterpenoid saponins; oleano- lic acid, albigenic acid, albigenin and acacic acid. The bark contains 7-11% condensed tannin; also d-catechin and d-leucocyanidin.

Aqueous extract of the bark decreased histamine-induced broncho- spasm in guinea pigs.

Alcoholic extract of stembark contains cardenolide glycosides of digitox- in nature. It showed antidermatophyt- ic activity. Anthraquinone glycosides and its aglycone exhibited antibacterial activity.

A saponin from seeds exhibited spermicidal activity in animals. EtOH (50%) extract of pods was found to be spermicidal against rat and human spermatozoa at 2% concentration.

The therapeutic properties of Albizia julibrissin Durazz, Pink Siris, found in the outer Himalayas from the Indus eastwards to Sikkim, are the same as those of A. lebbeck.

Dosage: Stembark—3-6 g powder.

20-50 g for decoction. (API

Vol. III.)... albizia lebbeck

(Pers.) F. Muell. ex Benth.

Family: Umbelliferae.

Habitat: Native to America; cultivated in Andhra Pradesh, Gujarat, Madhya Pradesh, Karnataka.

Ayurvedic: Ajmodaa, Dipyaka.

Unani: Ajmod, Karafs-e-Hindi.

Siddha: Omam.

Action: See Apium graveolens.

The essential oil contains Meethers of thymol, carvacrol and thymoquinol; used as a carminative. The oil shows strong antifungal activity against Candida albicans, and moderate activity against Gram-positive and Gramnegative bacteria.

Dosage: Dried fruit—3-6 g powder. (API Vol. II.)... apium leptophyllum

A measure of how many days a patient, on average, spends in the hospital. Hence, this measure, when applied to individuals or specific groups of patients, may be an indicator of the severity of illness and resource use. It is often used as a comparison to assess efficiency of resource usage between hospitals.... average length of stay (alos)

Love, Success, Healing... balm, lemon

Picked, dried in the sun and infused with boiling water, blackberry leaves are the essence of most berry-flavored teas. Studies suggest that the leaves contain a healthy dose of flavonoids, which are known for their antioxidant activity.... blackberry leaves

See VENESECTION.... blood-letting

See BED BUG.... cimex lectularius

A spectrum of skin disease caused by protozoan Leishmania spp, with a lifecycle and vectors identical to that of Leishmania donovani (see visceral leishmaniasis). The spectrum of disease ranges from a single, dry cutaneous lesion (L. tropica) through to destructive mucocutaneous lesions (L. braziliensis braziliensis).... cutaneous leishmaniasis

Artichoke leaf tea is one of oldest natural remedies valued by Egyptians. Nowadays, it is largely used to treat ailments like constipation, indigestion or liver disorders, but not only. Artichoke leaf tea description Artichoke is a perennial thistle plant originating from the Mediterranean areas of Southern Europe and North Africa. It has arching leaves which are deeply lobed. Artichoke usually blossoms from the end of spring up to the middle of summer. It is said to be one of the world’s oldest vegetables. People normally intake the fleshy portion of the artichoke leaves, its green base and its core. Artichoke leaf tea is the beverage resulting from brewing the leaves of the abovementioned plant. It is a caffeine-free substitute for those who want to avoid consuming coffee. Artichoke Leaf Tea brewing To prepare Artichoke leaf tea, consumers need a teapot, a strainer and a heatproof cup or mug:

• Heat water in a teapot to about 208 degrees F (or bring the water to a boil)
• Remove from heat for a minute or two
• Pour water into your cup or mug
• Immerse the tea bag (in case of loose-leaf tea, use a tea strainer)
• Let it steep for four to five minutes (If you steep the tea longer, the flavor will be stronger, but the tea might taste bitter)
• Remove the tea from the mug and serve it
• Add milk and/or sugar to taste

Artichoke Leaf Tea benefits Studies have shown that Artichoke leaf tea is successfully used to:

• lower bad cholesterol levels
• lower the risks of cardiovascular diseases
• promote good digestion by helping relieve constipation, heartburn, diarrhea and bloating
• support the functions of the liver fighting against cirrhosis and other ailments of the liver
• help lower blood sugar levels
• help lower the risks for diabetes
• help in the treatment of problems affecting the kidney
• strengthen the immune system
• eliminate toxins
• clean the skin

Artichoke Leaf Tea side effects Artichoke leaf tea is not recommended for patients with gallstones. Pregnant and nursing women, as well as small children, should not intake it until further research is conducted. Artichoke leaf tea is a beverage with no caffeine content, used to help in treating a large array of diseases. Except its healthy properties, it can be a good alternative for an afternoon or evening tea.... artichoke leaf tea

See HLA SYSTEM.... human leucocyte antigen (hla)

Hook. f. & Thoms.

Family: Papaveraceae.

Habitat: Mediterranean region and temperate Asia. (Allied species: H. pendulum Linn. and H. procumbens Linn., found in Peshavar, Multan, Waziristan and Baluchistan). Occurs in Sikkim.

Folk: Zirgulaki, Waziri.

Action: Used in stomachache. Juice of the plant has the same effect as opium. Leaves diaphoretic. Plant— narcotic.

The whole plant contains protopine (0.19) as the major alkaloid.... hypecoum leptocarpum

(American) Woman of the forest Leaf,, Leafie, Leafy, Leafey, Leafee, Leafea... leaf

The cuticular extension to fine pointed processes in the nematodes which have no lip; extension from the rim of the mouth called “external leaf-crown”, from the rim of the buccal capsule called “internal leaf-crown” as in Strongyloidea.... leaf-crown

A small leaf that is part of a compound leaf.... leaflet

(Hebrew) One who is weary; in the Bible, Jacob’s first wife Leia, Leigha, Lia, Liah, Leeya... leah

(French) One who is faithful; loyal Leola, Lealia, Lealie, Leal, Liealia... leala

(Greek) Feminine form of Leander; resembling a lioness

Leandre, Leandria, Leanza, Leanda, Leiandra, Leodora, Leoine, Leoline, Leonelle... leandra

Murraya Koenigii

Rutaceae

San: Kalasakh, Kaidaryah

Hin: Mithinim, Katnim

Ben: Barsunga

Mal: Kariveppu, Karuveppu

Tam: Kariveppilai, Karuveppu

Kan: Kari Baeva

Tel: Karivepaku

Ass: Narasingha, Bishahari

Importance: Curry leaf, a plant of homestead gardens has gained importance as a commercial crop and is cultivated for its culinary and medicinal value. The plant is highly esteemed for its leaves which promote appetite and digestion and destroy pathogenic organisms. It is reported to be useful in emaciation, skin diseases, hemopathy, worm troubles, neurosis and poisons. They are useful in vitiated conditions of kapha and pitta, hyperdipna, colic, flatulence, diarrhoea, dysentery, vomiting, inflammations and foul ulcers. “Kaidaryah” drug is prepared using this plant which improves voice, stimulates digestion and destroys concocted poisons in the system. The important preparations using the drug are Kalasadi kasayam, Pamantaka tailam, Jatyadi tailam, Jatyadi ghrtam, etc (Sivarajan et al,1994).

Distribution: Curry leaf is seen in the foot of the Himalaya and Bashahi eastwards to Sikkim and Peninsular India, upto 1700m. It is also found in Sri Lanka, Burma, Indo-China, South China and Hainan. Commercial cultivation in India is limited to Tamil Nadu and Karnataka states.

Botany: The genus Murraya of the family Rutaceae includes the following species:

M. Koenigii (Linn.) Spreng. syn. Bergera koenigii Linn.

M. Exotica Linn. syn. M. paniculata (Linn.) Jack.

Murraya koenigii is a small aromatic tree with dark grey bark and closely crowded spreading dark green foliage. Leaves are imparipinnate and alternate. Leaflets are alternate, obliquely ovate or somewhat rhomboid, gland dotted and strongly aromatic. Flowers are white, arranged in much branched terminal corymbose cymes and fragrant. Fruits are subglobose or ellipsoid berries, purplish black when ripe and 2-seeded (Warrier et al, 1995).

Agrotechnology: Curry leaf tree does not choose a specific climate and can come up even in dry climate too. In places where minimum temperature goes below 13 C, the growth of the shoot will be slightly affected. It comes up well in light textured red soils. DWD-1 and DWD-2 are two improved varieties released from UAS, Dharwad. Curry leaf is propagated by seed. Main field is to be ploughed repeatedly. A spacing of 90-120cm is followed on either side. Pits of size 30cm3 are dug out one month before planting and filled with top soil mixed with well decomposed FYM at the time of planting. Healthy seedlings are planted in the centre of the pits. Then long furrows are formed connecting all the pits to facilitate easy irrigation. The seedlings are irrigated once in 5-7 days upto 3 years and once in 15 days afterwards. The field should be kept free from weeds. Plants may be trained and pruned to maintain a bush of 1m in height. For better growth and yield, each plant is fertilised with 20kg of FYM besides 150:25:50g of N, P2O5, K2O/ year. Attack of aphids in the vegetative stage can be controlled by spraying of dimethoate at 2ml/l of water. Leaves from such sprayed plants should be harvested only after 10 days. Spraying carbendazim at 1g/l can take care of leaf spot diseases. The crop comes to first harvest at the end of first year. The yield of leaves account to 400kg/ha at the end of first year, 2000 to 2200kg/ha in the second and third year harvested at an interval of four months and 2500kg/ha in the fourth year harvested at three months interval. From fifth year onwards it is harvested at 2.5-3 months interval giving an yield of 3500-5000kg/ha (Kumar et al, 1997).

Properties and activity: All parts of the plant, especially the leaves are rich in carbazole alkaloids. These include members with (i) C13 - skeleton -murrayanin, mukoeic acid, mukonine and mukonidine; (ii) C18 - skeleton including gerinimbine, koenimbine, murrayacine, koenigine and koenigicine (koenidine); and (iii) C23- skeleton containing mahanimbine, mahanimbicine, iso- mahanimbicine, mahanine, mahanimbinine, murrayayazoline, murrayazolinine, murrayazolidine, cyclomahanimbine and bicyclomahanimbicine. Other carbazole bases include mukoline, mukolidine (C13 group, from roots), mukonicine (C18 from leaves), the biogenetically significant mukonal (C13, stem-bark), mahanimboline (C23, root-bark), iso- murrayazoline (C23, stem-bark). The leaves gave a coumarin glucoside, scopolin also. Essential oil from leaves contained -caryophylline, -gurjunene, -elemene, - phellandrene, -thujene as major constituents.

The roots, bark and leaves are bitter, acrid, astringent, cooling, aromatic, demulcent, depurative, anthelmintic, febrifuge, stomachic, appetising, carminative, antiinflammatory and antiseptic. Aerial part is spasmolytic and antiprotozoal. Root is antiprotozoal, CVS active and has effect on nictitating membrane. Leaf is hypoglycaemic (Hussain et al,1992).... curry leaf

(Gaelic) Form of Helen, meaning “the shining light”

Leana, Leann, Leanne, Lee-Ann, Leeann, Leeanne, Leianne, Leyanne, Leigh-Anne, Leighanna, Leeahnne, Leane, Leianna, Leighanne, Leighna, Leena, Leauna... leanna

(American) Form of Beatrix, meaning “one who blesses others” Leatrix, Leatriz, Leatriss, Leatrisse, Leatrize, Leatricia, Leatrisa, Leate, Leata, Leat, Leitris, Letrys, Lettrys... leatrice

(Hebrew) One who is dearly loved Lebah, Lebba, Lebbah... leba

A hereditary disease in which blindness comes on at about the age of 20.... leber’s disease

(Hebrew) Refers to frankincense Lebona, Lebonna, Lebonia, Lebonea, Leboniya, Levona, Levonia, Levonah, Levonea, Levonna... lebonah

Milk; usually cow’s milk; sometimes used as a substitute for water in the preparation of herbal remedies; can also be coconut milk (leche de coco); cow’s milk reported for use in treating kidney ailments and anemia and for preparing decoctions of calabaza or auyama seeds.... leche

(Polish) A beautiful maiden of the forest... lechsinska

(English) Form of Alice, meaning “woman of the nobility; truthful; having high moral character” Licia, Lecea, Licea, Lisha, Lysha, Lesha... lecia

(Greek) One who is queenly Ledelle, Ledele, Ledella, Ledela, Ledel... ledell

Dandelion (Taraxacum officinale).

Plant Part Used: Leaf, root.

Dominican Medicinal Uses: Leaf: fresh juice, orally, for liver conditions.

Safety: Leaves are widely consumed and generally considered safe; root and leaf: relatively nontoxic.

Contraindications: Root: digestive, biliary or gallbladder conditions, stomach inflammation, irritable bowel, digestive weakness, bowel obstruction (due to laxative, stomach acid stimulating& cholagogue effects);

Drug Interactions: Lithium (potential exacerbation of toxicity).

Laboratory & Preclinical Data: In vivo: analgesic, anti-inflammatory, anti-tumor, bile flow stimulant (root extracts); diuretic, hypoglycemic (leaf water extract).

In vitro: anti-inflammatory in CNS, anti-tumor, cytotoxic, antidiabetic, nitric oxide production, insulin secretion (root or plant extract); antioxidant (flowers),

Nutritional: potassium.

* See entry for Diente de León in “Part 3: Dominican Medicinal Plant Profiles” of this book for more information, including references.... diente de león

DC.

Synonym: G. tiliaefolia Lam.

Family: Rhamnaceae.

Habitat: Sub-Himalayan region from Kangra eastwards and in parts of Assam, Bengal, Bihar, Orissa and Andhra Pradesh.

Folk: Batvaasi (Nepal), Batvaasi (Bengal), Bitkil-chaand (Bihar).

Action: Leaves—used in poultices for sores. Bark—used for washing hair for destroying vermin.

The bark and root contain saponin. The leaves of a related species, Goua- nia microcarpa DC., found in Peninsular India from Konkan southwards, gave a triterpenic acid, along with tetratriacontanoic acid.... gouania leptostachya

Papaya (Carica papaya).

Plant Part Used: Fruit (ripe and unripe), papain enzymes.

Dominican Medicinal Uses: Fruit: eaten for digestive ailments, flatulence, stomachache, intestinal pain, heartburn, heart disease, hypertension, menopausal hot flashes, urinary tract infection, skin infection.

Safety: Ripe fruit is widely consumed and generally considered safe; topical application of the unripe fruit did not show toxicity in rabbits; other plant preparations have shown mixed results in animal toxicity studies.

Contraindications: Pregnancy and lactation (unripe fruit and papain); children under 12 years (due to lack of clinical data); history of hypersensitivity to fruit.

Drug Interactions: Warfarin (w/papain may cause excessive bleeding).

Clinical Data: Human clinical trials: guinea worm infection (leaves), immunomodulation (papain enzymes), burn wound-healing (fruit).

Laboratory & Preclinical Data: In vivo: abortifacient (unripe fruit constituents), anthelmintic (latex), antifertility—inhibits sperm motility (seed extract), antihypertensive (unripe fruit ethanolic extract); anti-ulcer (unripe fruit latex); diuretic (root); reversible azoospermia (seed extract).

In vitro: antiamoebic (seed extract), antihypertensive (unripe fruit ethanolic extract), antimicrobial, antioxidant (unripe fruit and seed), anti-salmonella (leaf and root extracts), immunomodulatory, immunostimulatory (seed extract), uterine stimulatory (fruit latex extract).

* See entry for Lechosa in “Part 3: Dominican Medicinal Plant Profiles” of this book for more information, including references.... lechosa

Roxb.

Family: Vitaceae.

Habitat: Throughout hotter parts of India.

Ayurvedic: Hastikanda, Hasti-karna Palaasha; Kekidandaa.

Folk: Hatkan, Dholsamudra, Haath, Kaan.

Action: Astringent, anodyne, styptic, antiseptic. Root tubers— astringent, mucilaginous; applied to wounds and sores; used for ringworm and guineaworm.... leea macrophylla

Love, Protection, Exorcism... leek

(Indian) An accomplished actress... leela

A term used when a hole in the septum (internal wall) of the HEART allows blood to ?ow from the systemic circulation properly con?ned to the left side of the heart to the pulmonary circulation, con?ned to the right. The shunt is usually detected by hearing a murmur, and the diagnosis con?rmed by ECHOCARDIOGRAPHY (see also SEPTAL DEFECT).... left to right shunt

Plumbago spp.

Plumbaginaceae

The genus Plumbago belonging to the family Plumbaginaceae is a popular and medicinally very important group of medicinal plants. Three species, namely P. rosea, P. zeylanica and P. auriculata have been identified. Among these P. rosea and P. zeylanica are important ones.

Plumbago, in general is an esteemed remedy for leucoderma and other skin diseases. The synonyms of fire like agnih, vahnih, etc. are attributed to this drug to indicate the very burning action of the root, causing blisters on the skin (daranah). The drug is used only after adequate curing and purification. Root is the officinal part and it enters into the composition of preparations like Citrakasavam, Dasamularista, Gulgulutiktaka kasaya, Yogarajachurna, etc.

1. P. rosea Linn. syn. P. indica Linn.

Eng: Rosy-flowered Leadwort; San: Citrakah, Dhahanah;

Hin: Lalcitra, Raktacitra;

Ben: Lalchita;

Mal: Kotuveli, Chettikkoduveli, Chuvannakotuveli;

Tam: Chenkotuveli, Cittiramulam;

Kan: Kempacitramula;

Tel: Yerracitramulam

Rosy-flowered leadwort or Fire plant is a native of Coromandel Coast. It is found throughout India, in moist situations as well as cultivated. The roots are useful in dyspepsia, colic, inflammations, cough, bronchitis, helmenthiasis, haemorrhoids, elephantiasis, chronic and intermittent fever, leprosy, leucoderma, ringworm, scabies, hepatosplenomegaly, amenorrhoea, odontalgia, vitiated conditions of vata, kapha and anaemia. It is a pretty subscandent perennial shrub with semi -woody striate stems and flexible branches. Leaves are simple, alternate oblong, short cuneate at the base passing into a very short amplexicaul, exauriculate, and reddish petiole. Flowers are bright red, arranged in long terminal spikes. The calyx ribs are covered with stipitate, bifarious and subsessile gland. Corolla tube is slender and four times as long as the calyx. The stout roots are cylindrical, irregularly bent, light yellowish brown with smooth surface having short transverse shallow fissures at the regions of the bents. A light yellowish juice excudes from the cut surface. A healthy plant may produce 18-20 stout roots (Warrier et al, 1995).

The chemical constituents include plumbagin and sitosterol glucoside. Clinical trials have demonstrated that plumbagin oil from P. indica is useful in common wart (Satyavati et al, 1987). The roots are acrid, astringent, thermogenic, anthelmintic, constipating, expectorant, antiinflammmatory, abortifacient, alterant, anti-periodic, carminative, digestive, sudorific, narcotic, gastric, nervous stimulant and rejuvenating. Root is a powerful sialogogue and vesicant.

2. P. zeylanica Linn.

Eng:White flowered Leadwort; San:Chitraka;

Hin, Ben:Chitarak, Chitra; Mal:Vellakotuveli

Tam: Sittragam, Chittiramoolam;

Kan: Vahini; Mar: Chitraka;

Tel: Chitramulam

White flowered Leadwort or Chitarak is found wild in peninsular India and mostly in West Bengal. Root is used externally in leprosy and other skin diseases or obstinate character, aphthae, abscesses, influenza, piles and anasarca. Juice is used externally in scabies and ulcers. One of the important preparations of Chitrak is “Yograjguggal”, prescribed for arthritis, rheumatism, etc. The other well known preparations are “Chitrak Adivati” and “ Chitraka Haritaki”. In Unani system it is an ingredient of “Aqaruva-i- Kabir”, “Hab Ashkhar”, “Ma’jun Baladur”, “Ma’jun Raig Mahi”, etc. It is a branched undershrub. Roots are long and tuberous. Stem is striate. Leaves are simple, alternate, short petioled, ovate or ovate-oblong, acute with entire or wavy margin, 7x3.8cm and glabrous. Flowers are white, arranged in terminal spikes. Calyx is tubular, glandular-hairy. Corolla tube is slender; limb rotate and 5 lobbed. Stamens are 5 on a disc. Style is slender with 5 stigmatic branches. Fruit is membranous capsule enclosed within the persistent calyx.

The roots of P. zeylanica have been exhaustively studied and naphthaquinones have been isolated, namely, plumbagin, 3-chlroplumbagin, droserone (Sidhu et al, 1971; Padhye et al, 1973), 3,3’-biplumbagin(Chitranone), zeylanone and iso-zeylanone and a coumarin, elliptinone (Sankaram et al, 1976, 1979). It also contains 1,2(3)-tetrahydro-3,3’-biplumbagin and plumbazeylanone. The leaf is antirheumatic. Root is appetiser, sudorific, relieves pain, vasicant, diuretic, caustic, antidiarrhoeal and expellent of phlegmatic tumours. Root is uterine stimulant. Root and fruits have antiimplantation activity. Plumbagin induces antiimplantation, has abortifacient and antiovulatory activity and causes selective testicular lesions in dogs. It is also a mitotic inhibitor. In lower concentration it behaves like a spindle, poison but in higher concentration it exhibits radiomimetic, nucleotoxic and cyclotoxic effects. It also has antibacterial, antifungal and anticoagulant activities and shows antagonism to amphetamine hyperactivity in mice.

3. P. auriculata Lam. syn. P. capensis

Eng: Blue flowered Leadwort;

Mal: Neelakotuveli

The blue flowered Leadwort is often grown in gardens throughout India (Moos, 1976; Chunekar, 1982; Sharma, 1983). It is a native of Cape Province in South Africa. It is a constituent of many Ayurvedic drugs (KAU, 1991). The plant is a subshrub growing to a height of 1-1.5m. Leaves are elliptic to obovate, 3-4 x 1.5-2cm. Inflorescence is a raceme of length 3-4cm. Corolla is blue to violet. Stamens are 5 in number. Flowers and fruits may be upto 12 in number (Matthew, 1995).

Agrotechnology: The plant is grown in tropical to subtropical ecosystems. Warm humid tropical climate is most suited. They come up well in almost all types of deep and well drained soils. It is propagated vegetatively by stem cuttings. Three stem cuttings of size 15cm long are planted in polybags of size 14x10cm. IAA and IBA treatments will improve rooting of cuttings. The land is to be ploughed well. About 4 tonnes of FYM are to be applied, mixed thoroughly and seed bed of size 50cm breadth, 1.5cm height and convenient length are to be prepared. On these beds pits are taken at a distance of 25cm and the rooted plants are transplanted from the polybags. Regular irrigation and weeding are to be carried out. In the second year with the onset of monsoon, seedbeds are again refreshed after adding about 4 tonnes of FYM. At the end of second year tubers are collected. Care should be taken to wear gloves, else the chemical plumbagin present in the roots will cause burning sensation. The collected tubers are washed, tied into bundles and marketed. Plumbago yields about 7-10t tubers/ha with good management (Prasad et al, 1997).... leadwort

Power, conferred by legal authority, to control an indivdual’s affairs in relation to medical or other care.... legal guardianship

(Spanish) Refers to the Virgin Mary Legare, Legarra, Legara, Lera, Leira... legarre

(American) One who is memorable Legende, Legund, Legunde... legend

(Spanish) A bright woman Legiah, Legea, Legeah, Legiya, Legiyah, Legya, Legyah... legia

(Hebrew) A fiery woman; the little flame

Lehavah, Lehavia, Lehavea, Lehavit, Lehaviya... lehava

(Hawaiian) Resembling a small flower Leeko, Lyko, Liko, Lieko... leiko

(Hawaiian) Child of heaven; adorned with heavenly flowers Leia, Lalani, Leilanie, Leilanee, Leilaney, Leilany, Lalanie, Lalaney, Lalanee, Lalany, Leilanea, Lalanea... leilani

Linn.

Synonym: L. hirta Roxb. ex Hornem.

Family: Vitaceae.

Habitat: Northern Eastern India, West Peninsula and the Andamans.

Ayurvedic: Kaakajanghaa, Nadikaantaa, Sulomaasha, Paaraa- vatapaadi.

Folk: Surapadi (Telugu).

Action: Stem and root—astringent, anthelmintic. Used for indigestion, jaundice, chronic fever and malaria. Essential oil—inhibits the growth of Mycobacterium tuberculosis (Schroeter) Lehmann & Neumann; also inhibits the growth of Micro- coccus pyogenes var. aureus and Pasteurella pestis. Root, tuber and stem—mucilaginous, astringent. Leaves and twigs—antiseptic; used for poulticing wounds.... leea aequata

Linn.

Family: Vitaceae.

Habitat: North-Eastern India and in Western parts of Deccan Peninsula.

Folk: Banachelt (Maharashtra), Banachalit (Bengal), Nalugu, Nellu (Kerala).

Action: Leaves—applied to wounds. Root tubers—used for guineaworm. Plant—a host of the Indian lac insect.

Action: Root—antidiarrhoeal, antidysenteric, antispasmodic, cooling, sudorific. A decoction allays thirst. Leaves—juice of young leaves, digestive. Ointment prepared from roasted leaves relieves vertigo.

The leaves contain amorphous froth forming acid.... leea crispa

Animals provided with suckers surrounding the mouth, and living a semi-parasitic life, their food being mainly derived from the blood of other animals. They abstract blood by means of the sucker, which has several large, sharp teeth. Land leeches live in tropical forests and can attach themselves to a person’s ankles and lower legs. Aquatic leeches are found in warm water and may attach themselves to swimmers. Their bites are painless, their saliva reducing the clotting properties of blood with hirudin; the result is that the wound continues to bleed after the leech has detached itself or been gently removed (lighted match, alcohol, salt and vinegar are e?ective removal agents). The medicinal leech, Hirudo medicinalis, was formerly employed for the abstraction of small quantities of blood in in?ammatory and other conditions. Nowadays it is occasionally used to drain haematomas and to manage healing in certain types of plastic surgery.... leeches

(LD Bodies) Amastigote stages of protozoa of the genus Leishmania. These stages in a skin biopsy, bone marrow or spleen aspirate are diagnostic of Leishmaniasis.... leishman-donovan bodies

(Greek) One who is forgetful; in mythology, Lethe was the river of forgetful- ness

Leith, Leithe, Lethe, Letha, Lethia, Lethea... leitha

(French) Filled with happiness Lejoy, Lejoye... lejoi

Lemon Thyme Tea is popular for treating infections, congestion problems, calming and relaxing the senses.  Lemon thyme (thymus citriodorus) can be recognized by its lace-shaped, light green colored leaves and lemon scent. Due to its aromatic leaves, lemon thyme is used as a flavoring agent for many dishes, especially those involving fish, chicken and vegetables. The constituents of lemon thyme tea include geraniol, esters, nerol, citronellol, citral and thymol. The essential oil that is extracted from the leaves contains a higher level of these constituents than the actual leaves. How To Make Lemon Thyme Tea You can brew Lemon Thyme Tea by placing small dried leaves in a kettle of boiled water. Let the mix steep for about 5-7 minutes. Then, using a strainer to catch the leaves, pour the tea into your cup. Lemon Thyme Tea Benefits

• Helps fight asthma in children.
• Prevents infections caused by viruses, fungi or bacteria.
• Provides relaxation.
• It can be gargled and used as a deodorizing mouthwash.
• Facilitates good digestion.
• Boosts your immune system.

Lemon Thyme Side Effects Like in the case of Lemon Verbena Tea , there are a few side effects that you sould keep in mind when drinking Lemon Thyme Tea:

• If you suffer from allergies, avoid drinking Lemon Thyme Tea.
• Do not drink Lemon Thyme Tea if you are pregnant or breastfeeding.
• Avoid over-consumption

Lemon Thyme Tea is a wonderful tea with a tasty lemon flavor. Make sure you read the side effects listed above and stay away from them!... lemon thyme tea

Purification, Love... lemon verbena

Lemon Verbena Tea has been known for many years as being an incredible natural remedy for many disorders, especially the ones in the nervous and digestive systems. Lemon verbena (aloysia tryphilla) is native to South America, mainly in Argentina, Brazil and Peru. The herb can grow up to 1-3 meters and it can be recognized by its lancet shaped green leaves and tiny white or lavender-colored flowers. The constituents of lemon verbena are found in its specific oil which contains methyl heptenone, borneol, geraniol and dipentene. How To Make Lemon Verbena Tea To really experience its health benefits, you can make Lemon VerbenaTea by infusing 2 teaspoons of dried lemon verbena herbs into one cup of boiling water. Let the mix boil for a few minutes and then let it steep for about 5 minutes. Lemon verbena has a strong lemony scent and taste. Add some honey to really enhance its taste! Lemon Verbena Tea Benefits

• Lemon VerbenaTea strengthens the nervous system.
• Alleviates colon and stomach spasms.
• Helps reduce fever.
• Acts as a cough remedy.
• Helps with digestion.
• Calms menstrual cramps.

Lemon Verbena Tea Side Effects

• Make sure you do not suffer from any allergies, since Lemon Verbena Tea can cause skin irritation in some people.
• Pregnant and breastfeeding women must avoid drinking Lemon Verbena Tea and other herbal teas.
• Drinking large amounts of Lemon Verbena Tea may irritate the kidneys. Avoid drinking this tea if you suffer from kidney stones or any other kidney problems.

Lemon Verbena Tea is a healthy tea with many health benefits. Make sure you keep in mind its side effects and avoid over-consumption!... lemon verbena tea

Lemongrass tea is one of the most popular teas from South Asia. The lemongrass plant grows in India and tropical Asia being commonly used in teas, soups and curries. This plant has been used in medicinal purposes since ancient times due to its wonderful health benefits. How To Make Lemongrass Tea Lemongrass tea has a mild lemon taste with a hint of ginger and a tropical flower scent. You can easily brew your own herbal lemongrass tea by following some few easy steps: First of all you will need a pair of gloves to protect your hands from the leaves of the lemongrass plant because they can cut your skin when you pull them from the parent plant. To cut easier, use a sharp knife. Peel the outer layers of the lemongrass leaves (the dark green leaves surrounding the stalk inside) because they will give the tea a bitter taste if they are used. Then cut the remaining lemongrass plant into slices, about 3 inches long. For each cup you will need 1 tablespoon of lemongrass. Put the slices into the teapot, pour in the hot water and let it steep for about 5 minutes. Then strain the tea into your cup and sweeten it with honey or sugar. Optionally, you can add milk. Lemongrass Tea Benefits If you suffer from insomnia, a cup of lemongrass tea before bed provides you relaxation and a restful sleep. Lemongrass tea is a good aid in digestion, so drinking a cup of tea after a meal removes that full feeling and also, helps remove unhealthy food additives, chemicals and excess fats. Since it acts like a natural diuretic, lemongrass tea helps keep the kidneys and bladder working properly. Also, its powerful antioxidants keep the liver and pancreas healthy. A university study revealed that lemongrass tea may have a cholesterol-lowering effect in people. Another benefit is that lemongrass tea reduces the symptoms of anxiety and nervousness and it has been used in Brazil for centuries to treat nervous disorders. You can also use this tea on a wet rag to heal wounds or other skin problems, since lemongrass tea is known for its anti-bacterial and anti-fungal properties. Lemongrass Tea Side Effects Despite the fact that it has a lot of health benefits, lemongrass tea also has a few side effects. Make sure you will not drink lemongrass tea if you experience allergy symptoms after consuming lemongrass. It is not indicated for pregnant or breastfeeding women to drink lemongrass tea since it may have different effects on their child. In conclusion, lemongrass tea has a lot of benefits, from its calming effects to skin healing properties. Served hot or iced, this tea makes a wonderful drink during meals or before bed to have calm all night sleep.... lemongrass tea - a healthy herbal tea

(Hebrew) Feminine form of Lemuel; devoted to God Lemuelah, Lemuella, Lemuellah, Lemuel, Lemuele, Lemuelle... lemuela

(German) Form of Helen, meaning “the shining light”

Lina, Leena, Leyna, Leina, Lyna, Lenci, Lencie, Lency, Lencey, Lencee, Lenka, Lencea... lena

(American) One who smiles a lot Lenesha, Leneesha, Leneeshah, Leniesha, Lenieshah, Leneisha, Leneishah, Leneasha, Leneashah, Lenysha, Lenyshah... lenesha

The number of days between a patient’s admission and discharge. This abbreviation is often misused when the intent is to refer to average length of stay (ALOS).... length of stay (los)

(Latin) One who has soft and silky skin Lene, Leneta, Lenice, Lenita, Lennice, Lenos, Lenys, Lenisse, Lenysse, Lenyce, Lenet... lenis

(Native American) Talented with the flute

Lenmanna, Linmana, Linmanna, Lynmana, Lynmanna... lenmana

(English) Daughter of love Lennan, Lennin, Lenon, Lenan, Lenin... lennon

(Greek) Form of Eleanor, meaning “the shining light”

Lenor, Lenora, Lenorah, Lenorr, Lenorra, Lenorre, Leonora, Leonore, Lanora, Leanor, Leanora, Leanore, Leora, Leorah, Leeora, Liora, Leeor, Lior, Liorit, Leonor, Linore, Linor, Linora, Lenoa... lenore

Medic.

Family: Vitaceae.

Habitat: Forests of tropical and subtropical India, from Himalayas as far west as Kumaon, and southwards to the Peninsula.

Ayurvedic: Chhatri, Karkatajihvaa, Kukurjihvaa.

Siddha/Tamil: Nalava, Nyekki, Ottanali.

Folk: Karkani (Maharashtra).

Synonym: L. esculenta Moench.

Family: Papilionaceae; Fabaceae.

Habitat: Native to South West Asia; cultivated as a pulse crop mainly in North India, Madhya Pradesh and some parts of Maharashtra.

English: Lentil.

Ayurvedic: Masura, Masurikaa, Mangalyaa, Mangalyak, Adaasa.

Unani: Masoor.

Siddha: Misurpurpu.

Action: Seeds—mostly used as a pulse. Contain as much as 30% proteins (similar to those of peas and beans). Soup is used in gastric troubles and constipation. Paste or poultice is applied to foul and indolent ulcers.

Dosage: Dried seed—10-20 g. (API, Vol. III.) oil, extracted from the seeds, is similar to olive oil. The seeds possess feeble antimalarial activity. The seed extract showed 100% toxicity against Alternaria alternata and marked toxicity against Aspergillus niger.

Dosage: Root—5-10 g powder. (API, Vol. IV.)... lens culinaris

See EYE.... lens of the eye

(Russian) As delicate as a flower Lenusey, Lenusi, Lenusie, Lenusee, Lenusea... lenusy

(German) Daughter of the people Leota, Leodah, Leotah, Luete, Lueta... leoda

(Latin) Feminine form of Leon; having the strength of a lion Leeona, Leeowna, Leoine, Leola, Leone, Leonelle, Leonia, Leonie, Leontine, Leontina, Leontyne, Leontyna, Leowna, Leoma, Leonda, Leondra, Leondrea, Leonline, Leonela, Leoni, Leonine, Leonita, Leonlina, Leontin, Liona, Lione, Lyonene, Lyonet, Lyonette, Lyoneta, Lyonetta, Leonee, Leonea... leona

(French) Feminine form of Leonard; having the strength of a lion Lenarda, Leonda, Lennarda, Leonarde, Lenna, Leondra, Leodora, Leoarrie... leonarda

(Spanish) One who is fierce Leonsa, Leonsia, Leonsea, Leonsi, Leonsie, Leonsy, Leonsey, Leonsee... leonsio

(German) Feminine form of Leopold; a bold ruler of the people Leopoldia, Leopoldea, Leopoldina, Leopoldyna, Leopoldeena, Leopoldeana, Leopoldena, Leopoldine, Leopoldyne, Leopoldeen... leopolda

(Native American) Resembling a wildflower

Leoti, Leotee, Leoty, Leotey, Leotea... leotie

Linn. var. alba.

Family: Curciferace; Brassicaceae.... lepidium iberis

(Native American) Form of Sequoia, meaning “of the giant redwood tree”

Lequoya, Lequoiya, Lekoya, Lekoia... lequoia

Linn.

Leonotis nepetaefolia (L.) R. Br.

Family: Labiatae; Lamiaceae.

Habitat: Throughout the warmer parts of India.

Ayurvedic: Granthiparni, Kaaka- puchha.

Folk: Gathivan, Deepamaal (Maharashtra).

Action: Leaves—spasmolytic. Ash of flower head—applied to burns and scalds, in ringworm and other skin diseases.

The Ayurvedic Pharmacopoeia ofIn- dia recommends the root in cough, bronchitis and dyspnoea.

The root contains n-octacosanol, n-octacosanoic acid, quercetin, 4,6,7- trimethoxy-5-methylchromene-2-one, campesterol and beta-sitosterol-beta- D-glucopyranoside.

The plant contains 4,6,7-trimethoxy- 5-methyl-chromene-2-one.

The leaves contain neptaefolin, nep- taefuran, neptaefuranol, neptaefolinol, leonitin, neptaefolinin and (-)-55, 6- octadecadienoic acid.

The seed oil contains oleic, linoleic, palmitic and stearic acids. The fatty

Family: Labiatae; Lamiaceae.

Habitat: Native to Europe; also distributed in Himalayas from Kashmir to Kumaon.

English: Common Motherwort, Lion's Tail.

Unani: Baranjaasif. (Also equated with Artemesia vulgaris Linn; and Achillea millifolium Linn.)

Action: Stomachic, laxative, antispasmodic, diaphoretic, em- menagogue (used in absent or painful menstruation, premenstrual tension, menopausal flushes). Hypnotic, sedative. Used as a cardiac tonic. (Studies in China have shown that Motherwort extracts show antiplatelet aggregation actions and decrease the levels of blood lipids.)

Key application: In nervous cardiac disorders and as adjuvant for thyroid hyperfunction. (German Commission E.) As antispasmodic. (The British Herbal Pharmacopoeia.) The British Herbal Compendium indicated its use for patients who have neuropathic cardiac disorders and cardiac complaints of nervous origin.

The plant contains diterpene bitter principles, iridoid monoterpenes, flavonoids including rutin and querci- trin, leonurin, betaine, caffeic acid derivatives, tannins and traces of a volatile oil.

The herb is a slow acting adjuvant in functional and neurogenic heart diseases. Its sedative and spasmolytic properties combine well with Valeriana officinalis or other cardioactive substances.

The herb contains several components with sedative effects—alpha- pinene, benzaldehyde, caryophyllene, limonene and oleanolic acid. (Sharon M. Herr.)

Habitat: Western Europe. Seeds are imported into India from Persia.

English: Pepper-Grass.

Unani: Bazr-ul-khumkhum, Todari (white var.).

Action: Seeds—blood purifier; prescribed in bronchitis.

The fatty acid of the oil are: oleic 12.9, linoleic 47.87, linolenic 5.43, erucic 31.97, stearic 0.54 and palmitic 1.22%.

The seed mucilage on hydrolysis gave galactose, arabinose, rhamnose and galacturonic acid.

Flowering tops and seeds contain a bitter principle, lepidin.

The plant yield a sulphur-containing volatile oil.... leonurus cardiaca

Nees.

Family: Acanthaceae.

Habitat: North-west Himalayas and Sikkim and from Bihar to central, western and southern India.

Folk: Safed Raasnaa (Bihar). Hiran-chaaro, Paniru (Gujarat).

Action: Plant—bitter tonic. Used for rheumatic affections. (Raasnaa is equated with Pluchea lanceolata.)

Related species of Lepidagathis: L. cristata Willd., and L. hamiltoniana Wall. ex Nees. These are used as a bitter tonic in fevers and are applied to itchy affections of the skin. The leaves of L. incurva D. Don, synonymL. hyali- na Nees are chewed to relieve cough.... lepidagathis trinervis

Linn.

Family: Curciferace; Brassicaceae.

Habitat: North-West Himalayas.

Folk: Gonyuch (Ladakh).

Action: Plant—depurative, antilith- ic, diuretic, stomachic, antiscorbutic. An infusion is given for liver and kidney diseases. Also used as a resolvent in skin affections.

The leaves show dose-dependent increase of diuretic activity; also increase in potassium excretion in urine.

The leaves contain cholesterol, stig- masterol and beta-sitosterol.... lepidium latifolium

(Latin) Resembling a blackbird Lerolla, Lerolah, Lerolia, Lerolea... lerola

A female homosexual (see HOMOSEXUALITY); lesbians form about 2 per cent of the female population in the UK. Some engage in active sexual behaviour with another woman, with MASTURBATION, mutual stimulation of the CLITORIS and oral sex being the usual techniques for achieving ORGASM.... lesbian

(Hebrew) Our precious child Leshama, Leshamah, Leshamia, Leshamea, Leshamiya, Leshmya... lesham

(Gaelic) From the holly garden; of the gray fortress

Leslea, Leslee, Lesleigh, Lesley, Lesli, Lesly, Lezlee, Lezley, Lezlie, Lezleigh, Lezli, Lioslaith, Lezlea... leslie

(Latin) One who is glad; joyful; loved by all

Leeta, Lita, Lida, Leeda, Leita, Leida, Leyta, Lyta, Leyda, Lyda, Loida, Loyda, Leda, Luda, Ledaea, Ledah... leta

Linn.

Family: Curciferace, Brassicaceae.

Habitat: Native to West Asia; cultivated throughout India as a salad plant.

English: Garden Cress, Water Cress.

Ayurvedic: Chandrashuura, Chan- drikaa, Vaas-pushpaa, Pashume- hankaarikaa, Nandini, Suvaasaraa, Aashaalim.

Unani: Habb-ul-rashaad, Tukh-e- Taratezak, Haalim, Sipandaan.

Siddha/Tamil: Alivirai.

Action: Used in asthma, bronchial affections and bleeding piles. Seeds—lactagogue, diuretic, and emmenagogue. Used for treating skin disorders, fever, amoebic dysentery and asthma. Leaf— stimulant, antiscorbutic, diuretic. Roots—used in secondary syphilis and in tenesmus.

The Ayurvedic Pharmacopoeia of India recommends the use of dried seeds, in powder form, in gout.

The seeds are a good source of iron, but its bioavailability is poor (5.4% of total iron). They are used for rapid healing ofbone fractures. The ethano- lic extract of seeds significantly increased collagen synthesis and its deposition at bone fracture portion in the treated rats. The tensile strength of the broken tibiae also increased.

The seeds contain an alkaloid (0.19%), glucotropaeolin, sinapin (cho- line ester of sinapic acid), sinapic acid, mucilaginous matter (5%) and uric acid (0.108 g/kg). The seed oil exhibits pronounced oestrogenic activity.

The seed mucilage allays the irritation of the mucous membrane of intestines in dysentery and diarrhoea. It consists of a mixture of cellulose (18.3%) and uronic acid-containing polysaccharides; acid hydrolysis yield L-arabinose, D-galactose, L-rhamnose, D-glacturonic acid and D-glucose.

The plant contains pantothenic acid, pyridoxin and rutin. Ethanolic extract of the plant showed antiviral activity against rinderpest virus.

Dosage: Seed—3-6 g powder. (API, Vol. I.)... lepidium sativum

(American) Filled with happiness Letichell, Letichele, Letichelle, Letichela, Letichella, Letishel, Letishell, Letishele, Letishelle, Letishela, Letishella... letichel

(Latin) One who brings joy to others Laetitia, Laetizia, Latashia, Latia, Latisha, Letice, Leticia, Leticja, Letisha, Letizia, Letta, Lettice, Lettie, Lettitia, Letty, Letycja, Lateisha, Latesha, Laticia, Latitia... letitia

(Greek) In mythology, mother of Apollo and Artemis... leto

(American) Form of Letitia, meaning “one who brings joy to others” Letsy, Letsee, Letsea, Letsi, Letsie... letsey

Chastity, Protection, Love, Divination, Sleep... lettuce

Rees.

Synonym: L. linifolia Spreng.

Family: Labiatae; Lamiaceae. Ayurvedic: Dronpushpi (related species).

Folk: Tumbaa, Guumaa.

Action: Leaves—a decoction is used as a sedative in nervous disorders; also as a stomachic and vermifuge. Crushed leaves are applied externally for dermatosis, a poultice to sores and wounds.

Roots, stems and leaves are cyano- genetic.... leucas lavandulaefolia

W. & A.

Family: Asclepiadaceae.

Habitat: Sub-Himalayan tracts of Punjab and Uttar Pradesh and Deccan Peninsula up to an altitude of 900 m.

Ayurvedic: Jivanti; Jivaniya, Jiva- pushpa, Hemavati, Jivana. Shaaka- shreshtha, Payaswini, Maangalya, Madhusravaa. (Guduuchi, Medaa, Kaakoli and Vrkshaadani are also known as Jivanti.) (Haimavati is equated with Orris Root and Hemapushpa with Sarca asoca flower.)

Siddha/Tamil: Keerippaalai.

Folk: Dodishaak (Gujarat).

Action: Plant—stimulant and restorative. Improves eyesight. Found useful in the treatment of habitual abortion. Leaves and roots used in skin diseases.

The herb contains «-triacontane, cetyl alcohol, beta-sitosterol, beta- amyrin acetate, lupanol 3-O-digluco- side and lepitidin glycoside.

Stigmasterol and lipoid fraction of the plant exhibited estrogen mimetic effects.

Alcoholic extract of roots and leaves show antibacterial activity against Gram-positive and Gram-negative bacteria.

Intravenous administration of aqueous extract of stems has a pronounced and hypotensive action in anaesthetized dogs.

Dosage: Root—3-6 g powder. (CCRAS.)... leptadenia reticulata

Wight.

Synonym: L. pyrotechnica (Forsk.) Decne.

Family: Asclepiadaeae.

Habitat: Punjab, Western Uttar Pradesh, Rajasthan and northern parts of Mumbai along the sea coast.

Folk: Kheemp (Rajasthan), Kheep (Gujarat). Prasaarani is a doubtful synonym.

Action: Antiseptic. Plant used for the treatment of burns and wounds.

The plant contains a triterpenoid, leptadenol; also 2.32 g/100 g tannin.... leptadenia spartium

Wight.

Synonym: Argyreia elliptica (Wight) Choisy.

Family: Convolvulaceae.

Habitat: Chota Nagpur, Orissa, Deccan, Karnataka, Anaimalai Hills and Western Ghats from Konkan southwards to Kerala.

English: Silverweed.

Siddha/Tamil: Unnayangodi.

Folk: Khedari, Bond vel (Maharashtra).

Action: Leaves—a paste is applied externally in cough and quinsy.... lettsomia elliptica

Benth.

Synonym: L. leucocephala (Lam.) de Wit.

Family: Mimosaceae.

Habitat: The plains of India.

English: White Popinac, Lead tree.

Siddha/Tamil: Tagarai.

Folk: Vilaayati Baval Lasobaval (Gujarat).

Action: The bark and leaves contain 16.3 and 3% tannin respectively. Leaves also contain quercitrin (0.08%). The toxicity of the plant is due to an alkaloid leucenine or leucenol. Beta-and alpha-amino- propionic acid is reported to be identical with mimosine (from Mimosa pudica).

Seeds, in addition to a fatty oil (8.8%), also contain mucilage composed of mannans, glactans and xy- lans. Stachyose is also reported to be present in the seeds. (Heat treatment of leaves and seeds after moistening lowers the alkaloid content.)... leucaena glauca

R. Br.

Family: Labiatae; Lamiaceae.

Habitat: Bihar and South India.

Folk: Guumaa (var.). Sugandhak is a doubtful synonym.

Action: Plant—an infusion is given for colds and gastrointestinal troubles.... leucas martinicensis

(Greek) In mythology, a nymph Lucippe, Leucipe, Lucipe... leucippe

Or leuko- – a pre?x meaning white.... leuco

Spreng.

Family: Labiatae; Laminceae.

Habitat: Throughout India in cultivated fields, wastelands, roadsides.

English: White Dead Nettle.

Ayurvedic: Dronpushpi, Phalepush- paa, Kutambaka.

Siddha/Tamil: Thumbai.

Folk: Guumaa, Halkusa (smaller var.), Tumbaa.

Action: Carminative, antihis- taminic, antipyretic, febrifuge, antiseptic. Used in jaundice, anorexia, dyspepsia, fever, helminthic manifestation, respiratory and skin diseases.

Flowers—given with honey for coughs and colds to children. Leaves— juice is used as an external application for psoriasis, chronic skin eruptions and painful swellings.

An alcoholic extract of leaves shows antibacterial activity.

The plant gave oleanolic acid, urso- lic acid and beta-sitosterol. The root contains a triterpenoid, leucolactone, and the sterols, sitosterol, stigmasterol and campesterol.... leucas aspera

(Roth.) Spreng.

Family: Labiatae; Lamiaceae.

Habitat: Throughout the greater part of India, as a weed, ascending up to 1,800 m in the Himalayas.

Ayurvedic: Dronpushpi, Katumbaa. Siddha/Tamil: Tumbai. Folk: Guumaa, Dhurpi saaga, Halkusa (bigger var.), Tumbaa.

Action: Plant—stimulant, diaphoretic, antiseptic (fresh juice is used in scabies), insecticidal. Flowers— a syrup is used as a domestic remedy for coughs and colds. Dry leaves along with tobacco (1: 3) are smoked to treat bleeding as well as itching piles.

The Ayurvedic Pharmacopoeia ofIn- dia indicated the use of the dried whole plant in jaundice, inflammations, cough, bronchial asthma and intermittent fever.

The plant contains beta-sitosterol glycoside and traces of an alkaloid.

Dosage: Whole plant—5-10 ml juice; 1-3 g powder. (API, Vol. II.)... leucas cephalotes

The scienti?c name for white blood cells. Leucocytes contain no HAEMOGLOBIN so are colourless, and have a well-formed NUCLEUS. Healthy people have around 8,000 leucocytes per cubic millimetre of blood. There are three main classes of white cells: granulocytes, lymphocytes and monocytes.

Granulocytes Also known as polymorphonuclear leucocytes (‘polys’), these normally constitute 70 per cent of the white blood cells. They are divided into three groups according to the staining reactions of these granules: neutrophils, which stain with neutral dyes and constitute 65–70 per cent of all the white blood cells; eosinophils, which stain with acid dyes (e.g. eosin) and constitute 3–4 per cent of the total white blood cells; and basophils, which stain with basic dyes (e.g. methylene blue) and constitute about 0·5 per cent of the total white blood cells.

Lymphocytes constitute 25–30 per cent of the white blood cells. They have a clear, non-granular cytoplasm and a relatively large nucleus which is only slightly indented. They are divided into two groups: small lymphocytes, which are slightly larger than erythrocytes (about 8 micrometres in diameter); and large lymphocytes, which are about 12 micrometres in diameter.

Monocytes Motile phagocytic cells that circulate in the blood and migrate into the tissues, where they develop into various forms of MACROPHAGE such as tissue macrophages and KUPFFER CELLS.

Site of origin The granulocytes are formed in the red BONE MARROW. The lymphocytes are formed predominantly in LYMPHOID TISSUE. There is some controversy as to the site of origin of monocytes: some say they arise from lymphocytes, whilst others contend that they are derived from histiocytes – i.e. the RETICULO-ENDOTHELIAL SYSTEM.

Function The leucocytes constitute one of the most important of the defence mechanisms against infection. This applies particularly to the neutrophil leucocytes (see LEUCOCYTOSIS). (See also ABSCESS; BLOOD – Composition; INFLAMMATION; PHAGOCYTOSIS; WOUNDS.)... leucocytes

(Greek) In mythology, a sea nymph

Leucothia, Leucothiah, Leucotheah... leucothea

See LEUCO-.... leuko

White blood cells, of whatever race or creed.... leukocytes

Having abnormally high numbers of white blood cells, usually the result of a non-viral infection.... leukocytosis

Having abnormally low numbers of white blood cells.... leukopenia

A group of naturally occurring, slow-reacting substances (SRSS) which have powerful smooth-muscle stimulating properties, particularly on bronchial smooth muscle. Leukotrienes are a metabolic derivative of PROSTAGLANDINS. Leukotriene receptor antagonists, such as montelukast and za?rlukast, are drugs useful in asthma.... leukotrienes

An antidote to MORPHINE. It is usually given intravenously.... levallorphan tartrate

(Latin) One who is raised up; in mythology, goddess and protector of new- borns

Livana, Livaun, Levanah, Levanna, Levania, Levanea, Livanna, Livania, Livanea... levana

(Irish) Of the great elm Levayne, Levaine, Levayn, Levain, Levaen, Levaene... levane

The quantified expression of health status.... level of health

(Hebrew) One who joins forces with others

Leviah, Leviya, Leviyah, Levya, Levyah, Levea, Leveah... levia

(Latin) Resembling a lightning bolt Levyna, Levena, Leveena, Leviena, Leveina, Leveana... levina

(American) One who is straightforward Levit, Levitte, Levytt, Levyt, Levytte... levitt

(American) A lighthearted woman Leviti, Levitie, Levitee, Levitea, Levitey... levity

(American) A homebody Levorah, Levorra, Levorrah, Levoria, Levoriah, Levorea, Levoreah, Levorya, Levoryah... levora

A synthetic derivative of MORPHINE. It is an e?ective analgesic but, like morphine, is a drug of addiction.... levorphanol

(African) A very beautiful woman Lewah... lewa

(Hebrew) Of the white moon Lewanah, Lewanna, Lewannah... lewana

(Greek) Form of Alexandra, meaning “helper and defender of mankind” Lexa, Lexandra, Lexann, Lexi, Lexia, Lexina, Lexine, Lexus, Lexya, Lexea, Lex, Lexis, Lexiss, Lexy, Lexy, Lexee... lexie

(Spanish) One who upholds the law Leyah... leya

(American) One who smiles often Lezenah, Lezina, Lezinah, Lezyna, Lezynah, Lezene, Lyzena... lezena

See MLD.... minimum lethal dose (mld)

A minimum income level below which a person is officially considered to lack adequate subsistence and to be living in poverty. Poverty statistics are based on definitions developed by individual countries or constituencies.... poverty level / line

A protozoan disease caused by Leishmania donovani, found around parts of the Mediterranean basin, tropical Africa, South America, and central and eastern Asia. The disease is transmitted byfemale sandflies of the genus, Phlebotomus in the Old World and Lutzomyia in the New World. Full-blown disease is often fatal, if untreated. Growth nodules of the disease or leishmanioma form initially and, if spontaneous recoverydoes not occur, proliferating parasites burst out of the nodules, disseminating throughout the body.... visceral leishmaniasis (kala azar)

(Persl) Skottsb.

Synonym: L. excelsa Lesch.

Family: Campanulaceae; Lobeli- aceae.

Habitat: Hills of South India at altitudes above 1,800 m.

Ayurvedic: Nala (var.).

Folk: Devanala (var.) (Maharashtra.)

Action: Leaves—filtered solution is used in the control of aphids, tingids and mites on vegetable and other crops. Plant—poisonous to man and livestock. The leaves are cured and smoked as tabacco.... lobelia leschenaultina

Maca is a native plant of Peru and is used to increase libido, strength, stamina, and energy (I know, right? It’s like the perfect herb. Time to bake it into some cookies and deliver them to that co-worker/friend/neighbor you’ve had your eye on…). Further, maca can normalize all the sex hormones: testosterone, progesterone, and estrogen (i.e. a great option for combating the natural hormonal downslide that occurs with aging). If fertility issues are on your radar, maca is a great herb to include, as it regulates menstrual cycles and eases cycle pain. For menopause? Again, spotlight on hormones. Maca can ease this transition as well. It also decreases stress which, as we know, is a major downer to any sexual liaison. How to take maca? Well, you can buy it in supplement form, but you’re going to need a lot of it. I don’t care what the bottle says, you want to aim for 6-10 500mg capsules per day (at least!). Or, you can buy the powdered herb and blend a tablespoon into a smoothie or juice every day. The more you take? The better. There are no toxic side effects to this herb.... maca (lepidium meyenii)

Linn.

Family: Myrtaceae.

Habitat: Indegenous to Burma, Cambodia, Thailand, Malay Peninsula to Australia; grown in Indian gardens and parks.

English: Cajeput tree, Swamp Tea tree, White Tea tree.

Folk: Kaayaaputi. (The oil of Cajeput is imported into India, chiefly from France and Netherlands.)

Action: Oil—used as an expectorant in chronic laryngitis and bronchitis, and as a carminative. Acts as anthelmintic, especially against round worms. Enters into ointments for rheumatism and stiff joints, sprains and neuralgia, migraine, colds, influenza, and as a mosquito repellent.

Key application: The oil is antimicrobial and hypermic in vitro. (German Commission.)

The oil contains terpenoids, 1,8- cineole (40-65%) as major component, with alpha-pinene, alpha-terpineol, nerolidol, limonene, benzaldehyde, valeraldehyde, dipentene and various sesquiterpenes; 3,5-dimethyl-4,6,di- O-methylphloroacetophenone.

The essential oil of Melaleuca al- ternifolia (Tea Tree Oil) is indicated for acne, tinea pedis and toe and nail onychomycosis on the basis of human trials. (Sharon M. Herr.)

Tea Tree Oil is distilled from the leaves of several species of Australian trees belonging the genus Melaleuca, principaly from M. alternifolia. Tea Tree Oil should contain a maximum of 15% 1,8-cineole and a minimum of 30% (+)-terpinen-4-ol, the principal germicidal ingredient. Other constituents, alpha-terpineol and linalool, also exhibit antimicrobial activity. (Cited in Rational Phytotherapy.)

The essential oil of Melaleuca virdi- flora Solander ex Gaertner leaves, known as Niauli Oil, is used for catarrh of the upper respiratory tract. The oil is antibacterial and stimulatory to circulation in vitro. (German Commission E.) Like cajeput oil, the principal constituent is cineole (eucalyptol).

A related species, M. genistifolia, indigenous to Australia, is grown in botanical gardens at Saharanpur and Lucknow (Uttar Pradesh). The leaves and terminal twigs yield 0.53% of a volatile oil which consists mainly of d-pinene, and about 2% cineole and traces of aldehyde.... melaleuca leucadendron

Plantago species

Description: The broad leaf plantain has leaves over 2.5 centimeters across that grow close to the ground. The flowers are on a spike that rises from the middle of the cluster of leaves. The narrow leaf plantain has leaves up to 12 centimeters long and 2.5 centimeters wide, covered with hairs. The leaves form a rosette. The flowers are small and inconspicuous.

Habitat and Distribution: Look for these plants in lawns and along roads in the North Temperate Zone. This plant is a common weed throughout much of the world.

Edible Parts: The young tender leaves are edible raw. Older leaves should be cooked. Seeds are edible raw or roasted.

Other Uses: To relieve pain from wounds and sores, wash and soak the entire plant for a short time and apply it to the injured area. To treat diarrhea, drink tea made from 28 grams (1 ounce) of the plant leaves boiled in 0.5 liter of water. The seeds and seed husks act as laxatives.... plantain, broad and narrow leaf

Linn. f.

Family: Verbenaceae.

Habitat: Throughout Deccan Peninsula.

Ayurvedic: Paaraavata-padi, Kaakajanghaa. (Kaakajanghaa is also equated with Leea aequata Linn.)

Action: Roots—febrifuge, astringent.

Ethanolic extract and cold aqueous infusion of the leaf were found to suppress acetic acid-induced writhing in mice and carrageenan-induced hind paw oedema in rats. The flavonoids exhibited anti-inflammatory activity.... vitex leucoxylon

A chronic infection of the joints associated with the disease. Treatment of the primary condition is necessary. Two historic remedies are Sarsaparilla (Smilax) and Gotu Kola (Hydrocotyle asiatica). See: HANSEN’S DISEASE.

Treatment by general medical practitioner or infectious diseases specialist. ... arthritis – of leprosy

See: THUJA OCCIDENTALS. ... cedar leaf oil

See: OEDEMA, CRAMPS, VARICOSE VEINS. ... heavy aching legs

If you want to drink a special type of tea, try Olive Leaf Tea! It has an aromatic flavor, similar to green tea, but a bit sweeter, which makes for a pleasant cup of tea. Also, it has many benefits which help you stay healthy. Read to find out more! About Olive Leaf Tea Olive leaf tea is made from the leaves of the olive tree. We can find these trees on the coastal areas of the eastern Mediterranean Basin (including areas from Europe, Asia and Africa), as well as in northern Iran and northern Iraq. The leaves of the olive tree have a silvery green color. They are oblong, measuring 4-10cm long and 1-3 cm wide. The olive leaves are well-known for their many health benefits. Also, olive leaf extract is used for various soaps and skin creams. How to make Olive Leaf Tea Olive leaf teacan be bought either in loose leaf form or in tea bag form. In both cases, it is quite easy to prepare a cup of olive leaf tea. A teaspoon of olive leaves, or a teabag, is enough for one cup of olive leaf tea. Pour boiling water in the cup and let it steep for about 15 minutes. Once the steeping time is done, either remove the teabag or strain to remove the olive leaves. Also, if you’ve got olive trees around, you can make your own olive leaf tea. First, pick the healthy-looking leaves from the tree. Wash the leaves carefully; then, dry them in the oven, at a temperature below 65°C or 150°F. You can air-dry the leaves, too, but don’t leave them in direct sunlight, as that might reduce their health benefits. Once the leaves are dry, crush the leaves by hand, remove the stalks and store the dried herbs in paper packets. For a cup of olive leaf tea, just follow the simple steps mentioned above. Components of Olive Leaf Tea Olive leaves have many components which are good for our body. Seeing as the leaves are the main ingredient for the tea, the components are also transferred to the olive leaf tea.Some of the important ones include various antioxidants, polyphenols, and flavonoids. Olive leaves, as well as olive leaf tea, also have Vitamin C. Olive leaf tea doesn’t contain caffeine, so you don’t have to worry about getting any side effects caused by caffeine. Olive Leaf Tea Benefits Considering its many components, it’s not a lie when we say that a cup of olive leaf tea brings you many health benefits. First of all, olive leaf tea helps lower both LDL “bad” cholesterol levels and blood pressure. It also increases the blood flow by relaxing the arteries. Because of this, olive leaf tea is considered an important heart tonic. Olive leaf tea can also help you if you’ve got diabetes, as it lowers the blood sugar levels. Drinking olive leaf tea during winter can help you strengthen your immune system, and also fight against colds and the flu. It helps you relax, and it can count as an energy booster if you drink a lot of olive leaf tea. Olive leaf tea may also help you prevent the appearance of cancer or tumors. Plus, it is used in the treatment for viral infections, such as the Epstein-Barr disease, herpes, shingles, and malaria. It is also useful in healing inflammations of the bladder, as well as alienating arthritic pain and swelling. Olive Leaf Tea side effects If you know you’ve got a low blood pressure, don’t drink too much olive leaf tea. It will lower your blood pressure even more, and that might make you feel dizzy. In this case, be careful with the amount of olive leaf tea you drink. Some people might experience Herxheimers reaction when drinking olive leaf tea. Herxheimers reaction is an immune response to the release of toxins from pathogens which have been destroyed. It is a normal and good reaction, as that means the olive leaf tea is doing you good. The symptoms include    headaches, muscle and joint pain, fever, nausea, sore throat, and vaginal irritation. Reduce the amount of tea you drink, and also drink a large quantity of water daily to help the body eliminate the toxins. With this, the symptoms should disappear after a few days. Be careful if you’re taking any other medication. Olive leaf tea might interfere with the usual actions of the medication you’re taking. Before including olive leaf tea in your daily diet, make sure you talk to your doctor. If you’re pregnant or breast feeding, it is best to avoid drinking olive leaf tea. While it is not sure how harmful it can be in this case, it is best not to take a risk, in case it might cause miscarriages or affect the baby. Also, don›t drink more than six cups of olive leaf tea a day. It will lead to more side effects rather than to help you stay healthy. If you drink too much tea, the symptoms you might get are the following: headaches, dizziness, insomnia, irregular heartbeats, vomiting, diarrhea and loss of appetite. Make sure to reduce the amount of olive leaf tea you drink, if you get any of these. Not only does olive leaf tea have a pleasant taste, but one cup brings many health benefits with it. As long as you make sure you won’t get any side effects from consumption of olive leaf tea, you can easily include it in your daily diet. You definitely won’t regret it!... olive leaf tea

Locking at the knee (Prickly Ash bark). Legs aching from no known cause (Hawthorn, Motherwort). Legs, pins and needles (Cramp bark). Legs swollen, due to heart weakness or kidney disorder (Broom). Ankles, ‘giving way’ sensation (Cramp bark). ... legs

Pale patches on skin due to loss of pigmentation. May follow a skin disease or from handling chemicals. Vitiligo is a modified form of the disease. There is no known cure, although Dr Wm Burton (Ellingwood) found Butternut useful. Seeds of Psoralea corylifolia appear to be indicated. (Indian Journal of Pharmacy 26:141.1964)

See entry: HIMALAYAN COW PARSLEY. ... leukoderma

Part used: leaves. Contains Mangiferin. Action: anti-viral.

Uses: Herpes simplex virus (HSV-1). ... mango leaves

See: GALL-STONES. ... olive oil and lemon treatment

An epidemic form of encephalitis.

There have been no major outbreaks since the 1920s, but rare sporadic cases still occur.

Many people who survived the initial illness during the major epidemics developed post-encephalitic Parkinson’s disease.... encephalitis lethargica

(HLA) A type of protein belonging to the group known as histocompatibility antigens, which play a role in the immune system.... human leukocyte antigen

Ceratopteris species

Description: The leaves of water lettuce are much like lettuce and are very tender and succulent. One of the easiest ways of distinguishing water lettuce is by the little plantlets that grow from the margins of the leaves. These little plantlets grow in the shape of a rosette. Water lettuce plants often cover large areas in the regions where they are found.

Habitat and Distribution: Found in the tropics throughout the Old World in both Africa and Asia. Another kind is found in the New World tropics from Florida to South America. Water lettuce grows only in very wet places and often as a floating water plant. Look for water lettuce in still lakes, ponds, and the backwaters of rivers.

Edible Parts: Eat the fresh leaves like lettuce. Be careful not to dip the leaves in the contaminated water in which they are growing. Eat only the leaves that are well out of the water.

CAUTION

This plant has carcinogenic properties and should only be used as a last resort.... water lettuce

Sweet Bay. Victor’s laurel. Laurus nobilis L. Held in high esteem as a medicine and prophylactic by the ancient Greeks. French: Laurier franc. German: Edler Lorbeerbaum. Spanish: Lauro. Italian: Lauro franco. Young stems and old leaves yield highest content of oil.

Action: antiseptic, antifungal, gastric tonic, nutritive, mild sedative. Oil has mild bactericidal and anti- fungal properties. Anti-dandruff, Carminative, Cholagogue, Vermifuge.

Uses: Weak digestion, poor appetite; hot and soothing to a ‘cold’ stomach. Urinary infections (decoction). Chest infections (berries). Rheumatic pains (seed oil, externally).

Reportedly used in cancer. (J.L. Hartwell, Lloydia, 32, 247, 1969)

Boosts insulin activity. (American Health, 1989, Nov 8, p96)

Preparations: Average dose: 2-4 grams. Thrice daily.

Decoction. 1oz crushed leaves to 1 pint water simmered down to three-quarters of its volume. Dose. Half a cup thrice daily.

Bay bath. Place crushed leaves in a small muslin bag and steep in hot water.

Diet: taken as a culinary herb with potatoes, salads, soups, etc. A source of oleic acid and linoleic acid.

Contact dermatitis may sometimes occur as an allergy on handling the oil. ... bay leaves

Health Inca tea. Peruvian tea. Bolivian tea. Erythroxylum coca, Lam. Leaves. Leaves contain a minimal amount of cocaine.

A traditional remedy to prevent fatigue, to elevate mood, assuage hunger, increase pulse rate, stimulate the brain and nerves, and to enable great feats of endurance to be performed. Not on open sale; its use is discouraged. South Americans have been drinking coca leaf tea for hundreds of years apparently with no ill-effects and possibly some medical benefits. Natives drink 1-2 cups or more daily, as infused from decocainised leaves. Medical use: to assist withdrawal from cocaine addiction. Local anaesthetic. CD. (Misuse of Drugs Act 1973) ... coca leaves

Irritation, soreness, friction, inflammation. “People who use extended- wear soft contact lenses are more likely to develop serious microbial keratitis infection than users of other lenses.” (Research team, Moorfields Eye Hospital, London) Risk of keratitis was seen to increase when soft lenses were worn for more than six days.

Alternatives:– Douche. Simple teas: Fennel or German Chamomile; half a teaspoon dried herb or teabag to cup boiling water. Infuse 15 minutes. Half-fill eye-bath and use as douche, tepid. OR: quarter of a teaspoon distilled extract Witch Hazel in eye-bath; half-fill with water. Natural lubricant for contact lens is Evening Primrose oil (contents of a capsule). See: EYES, INFECTION.

Supplements. Daily. Vitamin A 7500iu, Vitamin B2 10mg, Vitamin C 400mg, Vitamin E 400iu, Beta carotene. Zinc 15mg. ... contact lens fatigue

Failure of the left ventricle to receive blood from the pulmonary circulation and to maintain efficient output of incoming blood to the arterial system. Failure to do so leads to congestion of blood in the lungs followed by fluid retention. If uncorrected, leads to kidney disturbance, low blood pressure, cyanosis (blueness of the skin). Onset may be tragically sudden.

Failure of the left ventricle may occur in cases of pericarditis, disease of the aortic valve, nephritis or high blood pressure.

Left ventricular failure is often of sudden onset, urgent, and may manifest as “cardiac asthma”.

Causes: blood clot, anaemia, thyroid disorder, coronary disease, congenital effects, drug therapy (beta blockers, etc), and to fevers that make heavy demands on the left ventricle.

Symptoms: breathlessness, wheezing, sweating, unproductive cough, faintness, bleeding from the lungs, palpitation. Cardiac asthma at night: feels he needs air; better upright than lying flat. Exertion soon tires. Sensation as if heart would stop. Blueness of lips and ears from hold-up in circulation of the blood through the lungs. Frequent chest colds. Awakes gasping for breath. Always tired. Cold hands and feet. Symptoms abate as compensation takes place. ‘Cream and roses’ complexion. The failure of left ventricle soon drags into failure of the right ventricle.

Right ventricular failure leads to congestive heart failure, with raised venous pressure in neck veins and body generally, causing oedema, ascites and liver engorgement.

Treatment. Agents to strengthen, support, and eliminate excess fluids from the body. BHP (1983) advises four main remedies: Hawthorn, Motherwort, Broom and Lily of the Valley. The latter works in a digitaloid manner, strengthening the heart, contracting the vessels, and lessening congestion in the lungs. Tinctures. Hawthorn 2; Stone root 1. Lily of the Valley 1. Dose: 15-45 drops thrice daily.

Broom tea. 2 teaspoons flowers, or 2-3 teaspoons tops and flowers, in cup water brought to boil and simmered one minute. 1 cup freely.

To remove fluid retention in the lungs, diuretics are indicated; chief among which is Dandelion root because of its high potassium content to prevent hypokalaemia. Dandelion coffee. As urinary excretion increases, patient improves.

Vitamin E. Not to be taken in left ventricular disorders.

Diet. See entry: DIET – HEART AND CIRCULATION.

UK Research. Researchers found that left ventricular failure was reduced by a quarter when patients were given magnesium intravenously for the first 24 hours after admission to the coronary care unit. They conclude that it should be given before any other heart therapy is commenced, and that patients should receive regular infusions if no other drug treatment is used. (The Lancet, 2.4.1994). This supports the use of magnesium sulphate (Epsom’s salts) by a past generation of herbal practitioners for the condition. ... heart – left ventricular failure (lvf)

Non-contagious acute infection affecting the mucous membrane of the lungs. A form of pneumonia, caused by the organism Legionella pneumophilla.

Onset: 2-10 days.

Sources of infection: water-cooling and air-conditioning plants, Aerosols.

Usually attacks those with existing lung weakness. Those with low natural resistance and smokers are most at risk. Epidemic or single cases. Diagnosis confirmed by Haematological laboratory.

Symptoms. High body temperature (above 39°C). Rigor. Shivering. Diarrhoea. Dry cough. Bleeding from stomach and intestines. Mental confusion. Chest pains, shortness of breath, occasional diarrhoea. Differential diagnosis. Glandular fever. Other forms of pneumonia.

Indicated: anti-microbials and expectorants.

Treatment. Formula. Pleurisy root 2; Echinacea root 2; Grindelia quarter. Dose – Powders: 500mg (two 00 capsules or one-third teaspoon). Liquid extracts: one 5ml teaspoon. Tinctures: two 5ml teaspoons. Every 3 hours. Take together with:–

Fenugreek tea. 2 heaped teaspoons seeds to each cup water simmered gently 10 minutes. Drink freely 1 cup. Seeds should be swallowed.

Enema. Strong Yarrow tea enema to control bowel bleeding. ... legionnaire’s disease

Olea europea L. Other names: see OLIVE.

Action: hypoglycaemic, hypotensive, diuretic, antispasmodic (mild), astringent diuretic, febrifuge, vulnerary, vasodilator, cholagogue.

Uses: To dilate coronary arteries and improve circulation of blood through the heart. Moderately high blood pressure. Infection of the urinary tract. Nephritis. To lower blood sugar – diabetes. To facilitate passage of gall-stones.

Preparations: Thrice daily.

Tea. 20-30g in 500ml (1 pint) boiling water; infuse 20 minutes. Dose: half-1 cup.

Decoction. 50-60g in 500ml water, gently simmer 10 minutes; stand 20 minutes. Dose:quarter to half a cup.

Powder, capsules: 210mg, 2 capsules. (Arkocaps) ... olive leaves

A very serious form of congenital heart disease (see heart disease, congenital). The baby is born with a poorly formed left ventricle, often associated with other heart defects. The aorta is malformed and blood can reach it only via a duct (the ductus arteriosus) that links the aorta to the pulmonary artery.

At birth, the baby may seem healthy. However, within a day or 2 the ductus arteriosus naturally closes off and the baby collapses, becoming pale and breathless. In most cases, hypoplastic left-heart syndrome cannot be treated surgically, and most affected babies die within a week. A few infants have been treated with heart transplants.... hypoplastic left-heart syndrome

The process by which knowledge or abilities are acquired, or behaviour is modified. Various theories about learning have been proposed. Behavioural theories emphasize the role of conditioning, and cognitive theories are based on the concept that learning occurs through the building of abstract “cognitive” models, using mental capacities such as intelligence, memory, insight, and understanding.... learning

Problems with learning, which result from a range of mental and physical problems.

Learning difficulties may be either general or specific.

In general learning difficulties, all aspects of mental and physical functioning may be affected.

Depending on the severity of the problem, a child with general learning difficulties may need to be educated in a special school.

Specific learning difficulties include dyslexia, dyscalculia (the inability to solve mathematical problems), and dysgraphia (writing disorders).

Causes of learning difficulties include deafness, speech disorders, and disorders of vision, as well as genetic and chromosomal problems.... learning difficulties

A form of pneumonia that is caused by LEGIONELLA PNEUMOPHILA, a bacterium that breeds in warm, moist conditions. The source of infection is often an air-conditioning system in a large, public building.

The first symptoms include headache, muscular and abdominal pain, diarrhoea, and a dry cough.

Over the next few days, pneumonia develops, resulting in a high fever, shaking chills, coughing up of thick sputum (phlegm), drowsiness, and sometimes delirium.

Treatment is with the antibiotic drug erythromycin.... legionnaires’ disease

Displacement of the crystalline lens from its normal position in the eye. Lens dislocation is almost always caused by an injury that ruptures the fibres connecting the lens to the ciliary body. In Marfan’s syndrome, these fibres are particularly weak and lens dislocation is common.A dislocated lens may produce severe visual distortion or double vision, and sometimes causes a form of glaucoma if drainage of fluid from the front of the eye is affected. If glaucoma is severe, the lens may need to be removed. (See also aphakia.)... lens dislocation

A type of leukaemia caused by proliferation of mature lymphocytes. Although it is incurable, the disease is not always fatal. The cause is unknown.

Symptoms develop slowly, often over many years. As well as symptoms and signs common to acute forms of leukaemia (see leukaemia, acute), there may be enlargement of the liver and spleen, persistent raised temperature, and night sweats. Diagnosis is by blood tests and a bone marrow biopsy. In many mild cases, no treatment is needed. To treat severe cases, anticancer drugs are given, sometimes with radiotherapy.... leukaemia, chronic lymphocytic

A type of leukaemia in which excessive numbers of immature white blood cells called blasts are produced in the bone marrow. If untreated, acute leukaemia can be fatal within a few weeks or months. The abnormal cells may be of 2 types: lymphoblasts (immature lymphocytes) in acute lymphoblastic leukaemia, and myeloblasts (immature forms of other types of white cell) in acute myeloblastic leukaemia.

Exposure to certain chemicals (such as benzene and some anticancer drugs) or high levels of radiation may be a cause in some cases. Inherited factors may also play a part; there is increased incidence in people with certain genetic disorders (such as Fanconi’s anaemia) and chromosomal abnormalities (such as Down’s syndrome). People with blood disorders such as chronic myeloid leukaemia (see leukaemia, chronic myeloid) and primary polycythaemia are at increased risk, as their bone marrow is already abnormal.

The symptoms and signs of acute leukaemia include bleeding gums, easy bruising, headache, bone pain, enlarged lymph nodes, and symptoms of anaemia, such as tiredness, pallor, and breathlessness on exertion. There may also be repeated chest or throat infections. The diagnosis is based on a bone marrow biopsy. Treatment includes transfusions of blood and platelets, the use of anticancer drugs, and possibly radiotherapy. A bone marrow transplant may also be required. The outlook depends on the type of leukaemia and the age of the patient. Chemotherapy has increased success rates and 6 in 10 children with the disease can now be cured, although treatment is less likely to be completely successful in adults.... leukaemia, acute

A type of leukaemia, also called chronic granulocytic leukaemia, which is caused by the overproduction of granulocytes, neutrophils, or polymorphonuclear leukocytes (see blood cells). The cause is unknown. This type of leukaemia usually has 2 phases: a chronic phase, which may last for several years, and a more cancerous phase, which is known as the blastic, accelerated, or acute phase.

During the chronic phase, symptoms may include fever, night sweats, and weight loss. Visual disturbances, abdominal pain, and priapism may also occur. The symptoms of the more cancerous phase are like those of the acute forms of leukaemia (see leukaemia, acute). The diagnosis is made from blood tests and a bone marrow biopsy. Treatment of the chronic phase includes anticancer drugs. When the disease transforms into the acute phase, treatment is similar to that given for acute leukaemia.... leukaemia, chronic myeloid

Any type of white blood cell.... leukocyte

A rare group of inherited childhood diseases in which the myelin sheaths that form a protective covering around many nerves are destroyed. These diseases cause severely disabling conditions, such as impaired speech, blindness, deafness, and paralysis, and are always fatal.... leukodystrophies

See vaginal discharge.... leukorrhoea

A group of antiallergy drugs, such as montelukast and zafirlukast, used to prevent symptoms of mild to moderate asthma. The drugs work by blocking the effects of leukotrienes – naturally occurring substances released in the lungs during an allergic reaction.

Because they are not bronchodilator drugs, and will not relieve an existing attack, they are usually used with bronchodilators and inhaled corticosteroids to reduce the frequency of attacks.

Side effects include gastrointestinal disturbances and headache.

Skin and hypersensitivity reactions may also occur.... leukotriene receptor antagonists

A synthetic version of the thyroid hormone thyroxine, used to treat hypothyroidism. Side effects, such as rapid heartbeat and tremor, may occur if the initial dose is too high.... levothyroxine

A syndrome characterized by unpleasant tickling, burning, prickling, or aching sensations in the leg muscles.

Symptoms tend to come on at night in bed; they may also be triggered by prolonged sitting.

The condition tends to run in families and is common in middleaged women, people with rheumatoid arthritis, smokers, and during pregnancy.

The cause is unknown, and there is no single cure; some patients benefit from cooling the legs, others from warming them.

Treatment with levodopa and calcium channel blockers can sometimes help.... restless legs

Difficulty in one or more areas of learning in a child of average or above average intelligence.

Specific learning disabilities include dyslexia and dyscalculia, where there is a problem with mathematics.... specific learning disability

lenses that are specially designed to give clear images, eliminating the coloured fringes that are produced with ordinary lenses (caused by splitting of the light into different wavelengths and hence its component colours). Such lenses are useful in scientific instruments, such as the eyepieces of microscopes.... achromatic lenses

impalpable pale spots that may be seen anywhere on the body and are a cutaneous sign of *tuberous sclerosis. Identification is facilitated by examination of the skin with an ultraviolet light source (*Wood’s light).... ash-leaf macules

a lens with fine parallel lines (almost invisible striations) across its width, used in various vision tests; for example, to test suppression and abnormal retinal correspondence. [B. Bagolini (20th century), Italian ophthalmologist]... bagolini lens

ultrasound features of the *Arnold–Chiari malformation in fetuses with spina bifida. The banana sign refers to the shape of the cerebellum owing to caudal displacement; the lemon sign refers to the lemon-shaped head resulting from scalloping of the frontal bones. See illustration.... banana and lemon signs

a soft contact lens that can be useful in managing certain external eye disorders, including tiny perforations.... bandage lens

see BiPAP.... bi-level positive airways pressure

pl. n. abnormal out-curving of the legs, resulting in a gap between the knees on standing. A certain degree of bowing is normal in small children, but persistence into adult life, or later development of this deformity, results from abnormal growth of the *epiphysis or arthritis. The condition can be corrected by *osteotomy. Medical name: genu varum.... bow-legs

fine colourless sharp-pointed crystals seen in the sputum of asthmatics. [J. M. Charcot (1825–93), French neurologist; E. V. von Leyden (1832–1910), German physician]... charcot–leyden crystals

the five vertical levels of skin that are successively penetrated by an invading *melanoma. They are: epidermis, papillary dermis, intervening zone, reticular dermis, and subcutaneous tissue. They usually correlate with the *Breslow thickness. [W. H. Clark (1924–97), US dermatologist]... clark’s levels

a disorder characterized by a combination of *parkinsonism and *dementia, which typically fluctuates. Visual hallucinations are common, and there is exquisite sensitivity to phenothiazine drugs. Abnormal proteins called Lewy bodies are found within the nerve cells of the cortex and the basal ganglia. It is the third most common cause of dementia (dementia with Lewy bodies) after *Alzheimer’s disease and vascular dementia.... cortical lewy body disease

(CRL) the longest measurement of the fetus from end to end. Measurement of the CRL of the embryo in the first trimester has been shown to be the most accurate parameter for assessment of gestational age; the measurement is less accurate at the end of the first trimester because of fetal flexion.... crown–rump length

an abnormality of small blood vessels (microscopically, an arteriovenous malformation), identified predominantly in the mucosal lining of the upper stomach, that may cause severe spontaneous haemorrhage. It can rarely be found in the duodenum, colon, jejunum, or oesophagus. If detected endoscopically, curative therapy is often possible, although the abnormality is often difficult to see at gastroscopy. Surgical exploration may be required if the bleeding is unresponsive to endoscopic treatment. [G. Dieulafoy (1839–1911), French physician]... dieulafoy’s lesion

(differential blood count) a determination of the proportions of the different kinds of white cells (leucocytes) present in a sample of blood. Usually 100 white cells are counted and classified under the microscope or by electronic apparatus, so that the results can readily be expressed as percentages of the total number of leucocytes and the absolute numbers per litre of blood. The information often aids diagnosis of disease.... differential leucocyte count

an inherited mutation in the gene coding for coagulation Factor V, which results in an increased susceptibility to develop venous *thrombosis.... factor v leiden

the radiographic finding of a straight line between fluid and gas within a hollow organ or cavity when a horizontal X-ray beam strikes the fluid surface tangentially. Multiple long fluid levels are seen in loops of small bowel that are obstructed. A fluid level in the lung suggests a cavity that is partially filled with fluid (e.g. an abscess).... fluid level

see HLA system.... human leucocyte antigen system

a congenital heart disorder in which the left side of the heart, particularly the left ventricle, is underdeveloped. The first part of the aorta may also be abnormal. Affected babies usually develop severe heart failure within the first few days of life. Diagnosis can be confirmed on *echocardiography. Prognosis is generally very poor – most babies die within the first few weeks – but milder cases may be amenable to surgery. It is the commonest cause of death in the neonatal period due to heart disease.... hypoplastic left heart

a stage of *leukaemia in which there is a decrease in the number of white cells, red cells, and platelets in the blood and reduced *haemopoiesis in the bone marrow.... hypoplastic leukaemia

red spots on the palm of the hands caused by a bacterial infection of the heart (see endocarditis). [E. G. Janeway (1841–1911), US physician]... janeway lesions

n. a nodular form of glomerulosclerosis associated with diabetic nephropathy. See also diabetic glomerulosclerosis. [P. Kimmelstiel and C. Wilson (20th century), US physicians]... kimmelstiel–wilson lesion

a rare episodic disorder characterized by periods (usually of a few days or weeks), in which sufferers eat enormously, sleep for most of the day and night, and may become more dependent or aggressive than normal. Between episodes they are usually quite unaffected. The disorder almost always resolves spontaneously. [W. Kleine (20th century), German neuropsychiatrist; M. Levin (20th century), US neurologist]... kleine–levin syndrome

a hereditary condition (inherited as an autosomal *recessive) causing severe visual loss in infants. The *fundus usually appears to be normal when examined with an *ophthalmoscope, but marked abnormalities are found on the ERG (see electroretinography), usually with extinguished wave pattern. [T. Leber (1840–1917), German ophthalmologist]... leber’s congenital amaurosis

a rare hereditary disorder, usually affecting young males, that is characterized by loss of central vision due to neuroretinal degeneration. Visual loss in one eye is rapid and usually followed by loss in the second eye. [T. Leber]... leber’s optic atrophy

n. an enzyme from the small intestine that breaks *lecithin down into glycerol, fatty acids, phosphoric acid, and choline.... lecithinase

n. an *immunosuppressant drug used to treat rheumatoid and psoriatic arthritis that have not responded to methotrexate or other *disease-modifying antirheumatic drugs. Side-effects, including blood disorders caused by impairment of bone-marrow function, may be severe.... leflunomide

see heart failure.... left ventricular failure

(Perthes disease, pseudocoxalgia) necrosis of the head of the femur (thigh bone) due to interruption of its blood supply (see osteochondritis). Of unknown cause, it occurs most commonly in boys between the ages of 5 and 10 and causes aching and a limp. The head of the femur can collapse and become deformed, resulting in a short leg and restricted hip movement. Affected boys are kept under observation and their activities are restricted; surgery may be required in more severe cases. [A. T. Legg (1874–1939), US surgeon; J. Calvé (1875–1954), French orthopaedist; G. C. Perthes (1869–1927), German surgeon]... legg–calvé–perthes disease

a rare metabolic disorder that affects movement and development. Affected children are initially normal but lose coordination and balance as the disease progresses. There is no known cure at present. See also mitochondrial disorders. [D. Leigh (1915–98), British psychiatrist]... leigh syndrome

combining form denoting smoothness. Example: leiodermia (abnormal smoothness of the skin).... leio

n. a malignant tumour of smooth muscle, most commonly found in the uterus (it may arise in fibroids), stomach, small bowel, and at the base of the bladder. It is the second most common *sarcoma of soft tissues. This tumour is rare in children, occurring most commonly in the bladder, prostate, and stomach. Treatment is with surgery; these tumours are poorly responsive to chemotherapy and radiotherapy.... leiomyosarcoma

see Leishmania. [Sir W. B. Leishman (1865–1926), British surgeon; C. Donovan (1863–1951), Irish physician]... leishman–donovan body

n. a genus of parasitic flagellate protozoans, several species of which cause disease in humans (see leishmaniasis). The parasite assumes a different form in each of its two hosts. In humans, especially in *kala-azar patients, it is a small rounded structure, with no flagellum, called a Leishman–Donovan body, which is found within the cells of the lymphatic system, spleen, and bone marrow. In the insect carrier it is long and flagellated.... leishmania

n. a ribbon-like tract of nerve tissue conveying information from the spinal cord and brainstem upwards through the midbrain to the higher centres. On each side a medial lemniscus acts as a pathway from the spinal cord, while an outer lateral lemniscus commences higher up and is mainly concerned with hearing.... lemniscus

see banana and lemon signs.... lemon sign

n. a drug, related to *thalidomide, that affects the immune response and has activity against tumour cell formation and *angiogenesis. It is used to treat multiple myeloma and certain types of *myelodysplastic syndromes. The most serious side-effects are deep vein thrombosis and neutropenia, and there is a risk of *teratogenesis (women capable of bearing children must practise contraception during treatment and for a month before and after it).... lenalidomide

n. a surgical procedure in which the crystalline lens of the eye is removed.... lensectomy

n. an instrument used to measure the refractive properties of an artificial lens, such as a spectacle lens.... lensmeter

n. a condition in which the anterior surface (anterior lenticonus) or the posterior surface (posterior lenticonus) of the lens of the eye has a much steeper curvature than normal and bulges as a blunted cone. It is usually congenital.... lenticonus

(lentiform nucleus) see basal ganglia.... lenticular nucleus

n. a bilateral symmetrical hypertrophy of the bones of the face and cranium, said to resemble the appearance of a lion’s head. It is a rare feature of untreated *Paget’s disease; the cause is unknown. Medical name: leontiasis ossea.... leontiasis

an aggravation of lumps on the skin caused by *leprosy, accompanied by fever and malaise.... lepra reaction

n. a chemical prepared from lumps on the skin caused by lepromatous *leprosy.... lepromin

(lepto-) combining form denoting 1. slender; thin. 2. small. 3. mild; slight.... lept

n. a red blood cell (*erythrocyte) that is wafer-thin, generally large in diameter, and displays a thin rim of haemoglobin at the periphery with a large area of central pallor. Leptocytes are seen in certain types of anaemia.... leptocyte

pl. n. the inner two *meninges: the arachnoid and pia mater.... leptomeninges

n. inflammation of the inner membranes (the *pia mater and *arachnoid) of the brain and spinal cord. See also meningitis.... leptomeningitis

n. weakness of the voice.... leptophonia

n. the first stage in the first prophase of *meiosis, in which the chromosomes become visible as single long threads.... leptotene

a condition in males characterized by absence of penile erection combined with absence of pulses in the femoral arteries and wasting of the buttock muscles. It is caused by occlusion of the abdominal aorta and iliac arteries. [R. Leriche (1879–1956), French surgeon]... leriche’s syndrome

a *sex-linked hereditary disease caused by an enzyme deficiency resulting in overproduction of uric acid. Affected boys have learning disabilities and suffer from *spasticity and gouty arthritis. They also have a compulsion for self-mutilation. [M. Lesch (1939–2008) and W. L. Nyhan Jr. (1926– ), US physicians]... lesch–nyhan disease

n. see aromatase inhibitor.... letrozole

see Langerhans cell histiocytosis. [E. Letterer (20th century) and S. A. Siwe (1897–1966), German physicians]... letterer–siwe disease

(leuco-, leuk-, leuko-) combining form denoting 1. lack of colour; white. 2. leucocytes.... leuc

n. a procedure for removing a quantity of white cells from the blood. Blood is withdrawn from the patient through a vein and passed through a machine (a cell separator). White cells are removed and the rest of the blood is returned to the patient through another vein. This method can be used to collect peripheral blood *stem cells from a patient.... leucapheresis

n. the presence of excess white blood cells (leucocytes) in the semen (more than 1 million/ml). It has an adverse effect on fertility.... leucocytospermia

n. see lysin.... leucolysin

n. a white opacity occurring in the cornea. Most leucomas result from scarring after corneal inflammation or ulceration. Congenital types may be associated with other abnormalities of the eye.... leucoma

n. white discoloration of the nails, which may be total or partial. There are many causes.... leuconychia

n. the process of the production of white blood cells (leucocytes), which normally occurs in the blood-forming tissue of the *bone marrow. See also granulopoiesis; haemopoiesis; lymphopoiesis; monoblast.... leucopoiesis

(leukostasis) n. abnormal leucocyte aggregation and clumping associated with a very high white blood cell count, often seen in *leukaemia patients. The brain and lungs are the two most commonly affected organs.... leucostasis

n. a bacterial *exotoxin that selectively destroys white blood cells (leucocytes).... leukocidin

n. see leucostasis.... leukostasis

n. a chemical, present in inflammatory exudates, that attracts white blood cells (leucocytes) and increases the permeability of blood capillaries. It is probably produced by injured cells.... leukotaxine

n. the condition of having white hair. This may be seen with other, underlying, conditions, such as *vitiligo.... leukotrichia

n. one of a class of powerful chemical agents synthesized from arachidonic acid by mast cells, basophils, macrophages, and various other tissues. Leukotrienes are involved in inflammatory reactions and the immune response: they increase the permeability of small blood vessels, cause contraction of smooth muscle, and attract neutrophils to the site of an infection.... leukotriene

one of a class of drugs that prevent the action of *leukotrienes by blocking their receptors on cell membranes, such as those in the airways. These drugs are used in the management of asthma for their effects in relaxing the smooth muscle of the airways and in reducing inflammation in the bronchial linings. Examples are montelukast and zafirlukast; side-effects may include headache and abdominal pain or gastrointestinal upsets.... leukotriene receptor antagonist

n. see gonadorelin analogue.... leuprorelin

n. see sildenafil.... levitra

(laevo-) combining form denoting 1. the left side. 2. (in chemistry) levorotation.... levo

n. a *beta blocker used in the treatment of open-angle *glaucoma; it reduces intraocular pressure, probably by reducing the rate of production of aqueous humour. Side-effects may include local stinging and burning.... levobunolol

a test of the ability of the pituitary to secrete growth hormone, in which levodopa is administered by mouth and plasma levels of growth hormone are subsequently measured (they should peak within the following hour). It is a safer alternative to the *insulin stress test but does not give information on cortisol production, which is usually more clinically important to know.... levodopa test

(methotrimeprazine) n. a phenothiazine *antipsychotic drug used in the treatment of schizophrenia and to relieve agitation, nausea and vomiting, and pain in terminally ill patients. Side-effects include drowsiness and weakness.... levomepromazine

see thyroxine.... levothyroxine sodium

n. see fructosuria.... levulosuria

see cortical Lewy body disease. [F. H. Lewy (1885–1950), German neurologist]... lewy bodies

see interstitial cells. [F. von Leydig (1821–1908), German anatomist]... leydig cells

a tumour of the *interstitial (Leydig) cells of the testis. Such tumours often secrete testosterone, which in prepubertal boys causes *virilization and precocious puberty.... leydig tumour

lenses containing more than one segment made to different prescriptions for visual correction. See bifocal lens; trifocal lenses.... multifocal lenses

a variety of *leukaemia in which the type of blood cell that proliferates abnormally originates in the blood-forming (myeloid) tissue of the bone marrow. Myeloid leukaemias may be acute or chronic and may involve any one of the cells produced by the marrow. Blood cells in patients with chronic myeloid leukaemia contain a reciprocal *translocation between chromosomes 9 and 22 (see Philadelphia chromosome); molecular characterization of the translocation has led to the development of specific drugs to block the effects of this abnormality (see tyrosine kinase inhibitor).... myeloid leukaemia

a cytotoxin responsible for increased virulence of *Staphylococcus aureus (see leukocidin). It may cause fatal necrotizing pneumonia or, more commonly, deep skin abscesses that tend to recur frequently. [Sir P. N. Panton (1877–1950) and F. C. Valentine (20th century), British pathologists]... panton–valentine leukocidin

(PVL) softening of white matter around the ventricles of the brain in preterm infants due to a decreased blood supply to the brain, usually associated with *hypoxic-ischaemic encephalopathy. Diagnosis is by ultrasound, which shows increased density and, later, cysts in the periventricular area. The brain damage can cause visual impairment and cerebral palsy.... periventricular leucomalacia

see varifocal lenses.... progressive lenses

see erythema.... target lesions

lenses in which there are three segments. The upper provides a clear image of distant objects; the lower is used for reading and close work; and the middle one for the intermediate distance. Musicians sometimes find the middle segment useful for reading the score during performance.... trifocal lenses

(progressive lenses) lenses in which the power (see dioptre) gradually changes from one prescription to the other and there is no dividing line on the lens between the different segments (compare multifocal lenses). The wearer can see clearly at any distance by raising or lowering the eyes.... varifocal lenses

Peumus boldus

FAMILY: Monimiaceae

SYNONYMS: Boldu boldus, Boldoa fragrans, boldus, boldu.

GENERAL DESCRIPTION: An evergreen shrub or small tree up to 6 metres high, with slender branches, sessile coarse leaves and bearing yellowish-green fruit; when dried the leaves turn a deep reddish-brown colour. The whole plant is aromatic.

DISTRIBUTION: Native to Chile; naturalized in the Mediterranean region. Some essential oil is produced in Nepal and Vietnam.

OTHER SPECIES: The Australian tree Monimia rotundifolia contains a similar oil, which has been used as a substitute. The oil of chenopodium or wormseed is also chemically related.

HERBAL/FOLK TRADITION: The bark is used for tanning, the wood utilized in charcoal making and the fruit eaten by locals. In South America it has long been recognized as a valuable cure for gonorrhoea. In Western herbalism, the dried leaves are used for genito-urinary inflammation, gallstones, liver or gall bladder pain, cystitis and rheumatism. The dried leaves are current in the British Herbal Pharmacopoeia as a specific for cholelithiasis with pain.

ACTIONS: Antiseptic, cholagogue, diaphoretic, diuretic, hepatic, sedative, tonic, urinary demulcent.

EXTRACTION: Essential oil by steam distillation of the leaves.

CHARACTERISTICS: A yellow liquid with a powerful spicy-camphoraceous, disagreeable odour.

PRINCIPAL CONSTITUENTS: Cymene, ascaridole, cineol, linalol.

SAFETY DATA: Extremely toxic. ‘The oil has powerful therapeutic effects, and it can be considered harmful to the human organism even when used in very small doses … should not be used in therapy, either internally or externally.’.

AROMATHERAPY/HOME: USE None.

OTHER USES: Used in pharmaceuticals in minute amounts for its therapeutic properties.... boldo leaf

Eucalyptus dives var. Type

FAMILY: Myrtaceae

SYNONYMS: Broad-leaf peppermint, blue peppermint, menthol-scented gum.

GENERAL DESCRIPTION: A robust, medium-sized eucalyptus tree, with a short trunk, spreading branches and fibrous grey bark. The young leaves are blue and heart-shaped, the mature leaves are very aromatic, thick and tapering at both ends.

DISTRIBUTION: Native to Tasmania and Australia, especially New South Wales and Victoria. Oil is also produced in South Africa.

OTHER SPECIES: There are two types of broad-leaved peppermint although they look identical – one is rich in cineol (E. dives var. C.) and one is rich in ‘piperitone’ (E. dives var. Type). It is also similar to the peppermint eucalyptus (E. piperita) and the grey or narrow-leaved peppermint (E. radiata var. phellandra). See also entry on Eucalyptus, blue gum and Botanical Classification section.

HERBAL/FOLK TRADITION: The aborigines used the burning leaves in the form of a fumigation for the relief of fever; ‘heat went out of sick man and into fire’.

ACTIONS: See Eucalyptus, blue gum.

EXTRACTION: Essential oil by steam distillation from the leaves and twigs.

CHARACTERISTICS: A colourless or pale yellow mobile liquid with a fresh, camphoraceous, spicy-minty odour.

PRINCIPAL CONSTITUENTS: Piperitone (40–50 per cent), phellandrene (20–30 per cent), camphene, cymene, terpinene and thujene, among others. It is sold as Grades A, B or C according to the exact balance of constituents.

SAFETY DATA: Non-toxic, non-irritant (in dilution), non-sensitizing. Eucalyptus oil is toxic if taken internally (see entry on eucalyptus blue gum).

AROMATHERAPY/HOME: USE

Skin Care: Cuts, sores, ulcers etc.

Circulation muscles and joints: Arthritis, muscular aches and pains, rheumatism, sports injuries, sprains, etc.

Respiratory System: Asthma, bronchitis, catarrh, coughs, throat and mouth infections, etc.

Immune System: Colds, fevers, ’flu, infectious illness, e.g. measles.

Nervous System: Headaches, nervous exhaustion, neuralgia, sciatica.

OTHER USES: Little used medicinally these days except in deodorants, disinfectants, mouthwashes, gargles and in veterinary practice. ‘Piperitone’ rich oils are used in solvents. Employed for the manufacture of thymol and menthol (from piperitone).

EUCALYPTUS, ... eucalyptus, broad-leaved peppermint

a fruit consisting of one carpel, opening on one side, such as a pea.... legume

Eucalyptus citriodora

FAMILY: Myrtaceae

SYNONYMS: Lemon-scented gum, citron-scented gum, scented gum tree, spotted gum, ‘boabo’.

GENERAL DESCRIPTION: An attractive, tall, evergreen tree with a smooth dimpled bark, blotched in grey, cream and pink, cultivated as an ornamental. The trunk grows fast, straight and to considerable height, and is used for timber. The young leaves are oval, the mature leaves narrow and tapering.

DISTRIBUTION: Native to Australia; cultivated mainly in Brazil and China.

OTHER SPECIES: There are numerous other species of eucalyptus – see entry on eucalyptus blue gum. See also Botanical Classification section.

HERBAL/FOLK TRADITION: Used traditionally for perfuming the linen cupboard by enclosing the dried leaves in a small cloth sachet. During the last century it was regarded as a good insect repellent, especially for cockroaches and silverfish.

ACTIONS: Antiseptic, antiviral, bactericidal, deodorant, expectorant, fungicidal, insecticide.

EXTRACTION: Essential oil by steam distillation from the leaves and twigs.

CHARACTERISTICS: A colourless or pale yellow mobile liquid with a strong, fresh, citronella-like odour and sweet balsamic undertone.

PRINCIPAL CONSTITUENTS: Citronellal (80–95 per cent), citronellol, geraniol and pinene, among others. (The gum or ‘kino’ contains the antibiotic substance ‘citriodorol’.)

SAFETY DATA: Non-toxic, non-irritant, possible sensitization in some individuals. Eucalyptus oil is toxic when taken internally, see Eucalyptus blue gum entry.

AROMATHERAPY/HOME: USE

Skin Care: Athlete’s foot and other fungal infections (e.g. candida), cuts, dandruff, herpes, insect repellent, scabs, sores, wounds.

Respiratory System: Asthma, laryngitis, sore throat.

Immune System: Colds, fevers, infectious skin conditions such as chickenpox, infectious disease. ‘The essential oil contained in the leaves appears to have bacteriostatic activity towards Staphylococcus aureus; this is due to synergism between the citronellol and citronellal present in the oil’..

OTHER USES: Used as a fragrance component (in place of E. globulus) in soaps, detergents and perfumes; also used in room sprays and insect repellents Employed for the isolation of natural citronellal.... lemon-scented

Liquidambar orientalis

FAMILY: Hamamelidaceae

SYNONYMS: Balsam styracis, oriental sweetgum, Turkish sweetgum, asiatic styrax, styrax, storax, liquid storax.

GENERAL DESCRIPTION: A deciduous tree up to 15 metres high with a purplish-grey bark, leaves arranged into five three-lobed sections, and white flowers. The styrax is a pathological secretion produced by pounding the bark, which induces the sapwood to produce a liquid from beneath the bark. It hardens to form a semi-solid greenish-brown mass with a sweet balsamic odour.

DISTRIBUTION: Native to Asia Minor. It forms forests around Bodrum, Milas, Mugla and Marmaris in Turkey.

OTHER SPECIES: Very similar to the American styrax (L. styraciflua) or red gum, which produces a natural exudation slightly darker and harder than the Levant type. There are also many other types of styrax; Styrax officinale produced the styrax of ancient civilizations. NB: Styrax benzoin is the botanical name for benzoin, with which it shares similar qualities.

HERBAL/FOLK TRADITION: In China it is used for coughs, colds, epilepsy and skin problems, including cuts, wounds and scabies. In the West it has been recommended as a remedy for catarrh, diphtheria, gonorrhoea, leucorrhoea, ringworm, etc. A syrup made from the bark of the American styrax is used for diarrhoea and dysentery in the western USA.

ACTIONS: Anti-inflammatory, antimicrobial, antiseptic, antitussive, bactericidal, balsamic, expectorant, nervine, stimulant.

EXTRACTION: Essential oil by steam distillation from the crude. (A resinoid and absolute are also produced by solvent extraction).

CHARACTERISTICS: A water-white or pale yellow liquid with a sweet-balsamic, rich, tenacious odour. It blends well with ylang ylang, jasmine, mimosa, rose, lavender, carnation, violet, cassie and spice oils.

PRINCIPAL CONSTITUENTS: Mainly styrene with vanillin, phenylpropyl alcohol, cinnamic alcohol, benzyl alcohol and ethyl alcohol, among others.

SAFETY DATA: Non-toxic, non-irritant, possible sensitization in some individuals. Frequently adulterated.

AROMATHERAPY/HOME: USE

Skin care: Cuts, ringworm, scabies, wounds.

Respiratory system: Bronchitis, catarrh, coughs.

Nervous system: Anxiety, stress-related conditions.

OTHER USES: Used in compound benzoin tincture, mainly for respiratory conditions. The oil and resinoid are used as fixatives and fragrance components mainly in soaps, floral and oriental perfumes. The resinoid and absolute are used in most major food categories, including alcoholic and soft drinks.

ACTIONS: Anthelmintic, antispasmodic, bactericidal, carminative, diaphoretic, emmenagogue, fungicidal, stomachic.... styrax, levant

Aloysia triphylla

FAMILY: Verbenaceae

SYNONYMS: A. citriodora, Verbena triphylla, Lippia citriodora, L. triphylla, verbena, herb Louisa.

GENERAL DESCRIPTION: A handsome deciduous perennial shrub up to 5 metres high with a woody stem, very fragrant, delicate, pale green, lanceolate leaves arranged in threes, and small, pale purple flowers. Often grown as an ornamental bush in gardens.

DISTRIBUTION: Native of Chile and Argentina; cultivated (and found semi-wild) in the Mediterranean region – France, Tunisia, Algeria – as well as Kenya and China. The oil is mainly produced in southern France and North Africa.

OTHER SPECIES: Botanically related to the oregano family – see Botanical Classification section. Not to be mistaken for the so-called ‘Spanish verbena’ or ‘verbena’ oil (Spanish) (Thymus hiamalis), nor confused with the herb ‘vervain’ (Verbena officinalis). This is further confused since the French name for verbena is verveine (Verveine citronelle, Verveine odorante).

HERBAL/FOLK TRADITION: ‘The uses of lemon verbena are similar to those of mint, orange flowers and melissa.’. It is indicated especially in nervous conditions which manifest as digestive complaints. The dried leaves are still used as a popular household tea especially on the Continent, both as a refreshing, uplifting ‘pick-me-up’ and to help restore the liver after a hang-over.

ACTIONS: Antiseptic, antispasmodic, carminative, detoxifying, digestive, febrifuge, hepatobiliary stimulant, sedative (nervous), stomachic.

EXTRACTION: Essential oil by steam distillation from the freshly harvested herb.

CHARACTERISTICS: A pale olive or yellow mobile liquid with a sweet, fresh, lemony, fruity-floral fragrance. It blends well with neroli, palmarosa, olibanum, Tolu balsam, elemi, lemon and other citrus oils.

PRINCIPAL CONSTITUENTS: Citral (30–35 per cent), nerol and geraniol, among others.

SAFETY DATA: Possible sensitization; phototoxicity due to high citral levels. Other safety data is unavailable at present – however, true verbena oil is virtually non-existent. Most so-called ‘verbena oil’ is either from the Spanish verbena (an inferior oil), or a mix of lemongrass, lemon, citronella, etc.

AROMATHERAPY/HOME: USE

Digestive system: Cramps, indigestion, liver congestion.

Nervous system: Anxiety, insomnia, nervous tension and stress-related conditions.

OTHER USES: Used in perfumery and citrus colognes – ‘eau de verveine’ is still popular in France, Europe and America.... verbena, lemon