river blindness

river blindness

* * *

Human disease caused by a filarial worm native to Africa but also found in parts of tropical America and transmitted by several blackflies.

It is so called because the flies that transmit the disease breed on rivers and mostly affect riverine populations. Blindness is caused by dead microfilariae
the larvae that can be produced for some 15–18 years by adult worms
inside the eye. River blindness is common in savannah areas of Africa and in Guatemala and Mexico. In 1987 the World Health Organization began to distribute the drug ivermectin (originally developed for use against livestock parasites), which eliminates the microfilariae, though it does not kill the adult parasite.

* * *

Universalium. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • river blindness — n. ONCHOCERCIASIS …   English World dictionary

  • river blindness — noun infestation with slender threadlike roundworms (filaria) deposited under the skin by the bite of black fleas; when the eyes are involved it can result in blindness; common in Africa and tropical America • Syn: ↑onchocerciasis • Hypernyms:… …   Useful english dictionary

  • River blindness — Onchocerciasis, a disease caused by a parasitic worm (Onchocerca volvulus) which is transmitted to persons by biting blackflies (buffalo gnats) that breed in fast flowing rivers. The adult worms can live for up to 15 years in nodules beneath the… …   Medical dictionary

  • river blindness — noun a tropical skin disease, sometimes also causing blindness, caused by a parasitic filarial worm and transmitted by blackflies which breed in rivers …   English new terms dictionary

  • river blindness — noun Date: 1953 onchocerciasis …   New Collegiate Dictionary

  • river blindness — noun Onchocerciasis …   Wiktionary

  • river blindness — see onchocerciasis …   The new mediacal dictionary

  • Blindness — This article is about the visual condition. For other uses, see Blindness (disambiguation). Blindness Classification and external resources A white cane, the international symbol of blindness ICD …   Wikipedia

  • river — n. 1 a copious natural stream of water flowing in a channel to the sea or a lake etc. 2 a copious flow (a river of lava; rivers of blood). 3 (attrib.) (in the names of animals, plants, etc.) living in or associated with the river. Phrases and… …   Useful english dictionary

  • river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”