Dracontiasis Health Dictionary

Dracontiasis: From 2 Different Sources


Dracontiasis, or dracunculiasis, is a nematode infection caused by Dracunculus medinensis (guinea-worm). The major clinical problem is secondary infection of the worm track, causing CELLULITIS, SYNOVITIS, epididymo-ORCHITIS, periarticular FIBROSIS, and ARTHRITIS; TETANUS is a potentially lethal complication. CHEMOTHERAPY is unsatisfactory and the time-honoured method of extracting the female adult by winding it around a matchstick remains in use. Surgical treatment may be necessary. Ultimate prevention consists of removing Cyclops spp. from drinking water.
Health Source: Medical Dictionary
Author: Health Dictionary
n. a tropical disease caused by the parasitic nematode Dracunculus medinensis (see guinea worm) in the tissues beneath the skin. The disease is transmitted to humans via contaminated drinking water. The initial symptoms, which appear a year after infection, result from the migration of the worm to the skin surface and include itching, giddiness, difficulty in breathing, vomiting, and diarrhoea. Later a large blister forms on the skin, usually on the legs or arms, which eventually bursts and may ulcerate and become infected. Dracontiasis is common in India and West Africa but also occurs in Arabia, Iran, East Africa, and Afghanistan. Treatment involves extracting the worm or administering anthelmintics.
Health Source: Oxford | Concise Colour Medical Dictionary
Author: Jonathan Law, Elizabeth Martin

Dracunculiasis

See DRACONTIASIS.... dracunculiasis

Filariasis

The term used to describe several clinical entities caused by one or other of the nematode ?lariae; these include Wuchereria bancrofti/Brugia malayi, Onchocerca volvulus, Loa loa, Dracunculus medinensis (DRACONTIASIS or guinea-worm disease), Mansonella perstans, etc. These organisms have widely di?ering geographical distributions. Whereas lymphatic ?lariasis is present throughout much of the tropics and subtropics, ONCHOCERCIASIS (river-blindness) is largely con?ned to west and central Africa and southern America. Loaiasis is an infection of west and central Africa, and dracontiasis involves west and central Africa and western India only.

Clinically, the lymphatic ?lariases characteristically cause ELEPHANTIASIS (lymphoedema); onchocerciasis gives rise to ophthalmic complications (river-blindness), rashes and subcutaneous nodules; loaiasis causes subcutaneous ‘Calabar swellings’ and subconjunctival involvement; and dracontiasis predisposes to secondary bacterial infections (usually involving the lower limbs). Diagnosis is by ?nding the relevant ?larial nematode, either in blood (day and night ?lms should be examined), or in one or other of the body ?uids. An EOSINOPHILIA is often present in peripheral blood. Serological diagnosis is also of value. In onchocerciasis, skin-snips and the Mazotti reaction are valuable adjuncts to diagnosis.

The mainstay of chemotherapy consists of diethylcarbamazine (aimed predominantly at the larval stage of the parasite). However, ivermectin (not available in the UK) is e?ective in onchocerciasis, and metronidazole or one of the benzimidazole compounds have limited value in dracontiasis. Suramin has been used to kill adult ?larial worms. Prevention consists of eradication of the relevant insect vector.... filariasis

Guinea-worm

See DRACONTIASIS.... guinea-worm

Tropical Diseases

Technically, those diseases occurring in the area of the globe situated between the Tropic of Cancer and the Tropic of Capricorn: pertaining to the sun. They include many ‘exotic’ infections – many of them parasitic in origin – which fall under the umbrella of ‘TROPICAL MEDICINE’. However, disease in the tropics is far broader than this and includes numerous other infections, many of them with a viral or bacterial basis: for example, the viral hepatidises, streptococcal and pneumococcal infections, and tuberculosis. The prevalence of other diseases, such as rheumatic cardiac disease, cirrhosis, heptocellular carcinoma (‘hepatoma’), and various nutrition-related problems, is also much increased in most areas of the tropics. With people from developed countries increasingly travelling to worldwide destinations for business and holiday, the ‘importation’ of tropical diseases to temperate climates should be borne in mind when people fall ill.

The following diseases and conditions are treated under their separate dictionary entries: ANCYLOSTOMIASIS; BERIBERI; BLACKWATER FEVER; CHOLERA; DENGUE; DRACONTIASIS; DYSENTERY; ELEPHANTIASIS; FILARIASIS; HEAT STROKE; LEISHMANIASIS; LEPROSY; LIVER, DISEASES OF; MALARIA; ORIENTAL SORE; PLAGUE; PRICKLY HEAT; SCHISTOSOMIASIS; SLEEPING SICKNESS; STRONGYLOIDIASIS; SUNBURN; YAWS; YELLOW FEVER.... tropical diseases

Guinea Worm

a nematode worm, Dracunculus medinensis, that is a parasite of humans. The white threadlike adult female, 60–120 cm long, lives in the connective tissues beneath the skin. It releases its larvae into a large blister on the legs or arms; when the limbs are immersed in water the larvae escape and are subsequently eaten by tiny water fleas (Cyclops), inside which their development continues. The disease *dracontiasis results from drinking water contaminated with Cyclops.... guinea worm



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