Onchocerciasis


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onchocerciasis

[‚äŋ·kō·sər′kī·ə·səs]
(medicine)
Infection with the filaria Onchocerca volvulus ; results in skin tumors, papular dermatitis, and ocular complications.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Onchocerciasis

 

a chronic parasitic disease that is caused by nematodes of the genus Onchocerca. Onchocerciasis occurs universally and mainly affects ungulates; the greatest economic damage arises when cattle and horses are affected. The intermediate hosts of Onchocerca are simuliids and ceratopogonids, which are bloodsucking insects. The infestation is most prevalent in pastures during the swarming time of the intermediate hosts. The mature parasites concentrate in the tendons, ligaments, and connective tissue, causing inflammatory foci that are often aggravated by pyogenic microflora.

Onchocerciasis usually occurs without observable symptoms. Diagnosis in the living animal is based on the presence of Onchocerca larvae in skin biopsies and on the results of allergic skin tests. No specific treatment is available. Onchocerciasis is prevented by protecting animals from the bites of simuliids and ceratopogonids and by exterminating these insects during hatching time, from May to August.

REFERENCE

Skriabin, K. I., and A. M. Petrov. Osnovy veterinarnoi nematodologii. Moscow, 1964.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Currently, onchocerciasis elimination programs rely primarily on mass drug administration of the therapy Ivermectin to suppress and eventually eliminate transmission of Onchocerca volvulus.
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Some identifiable challenges associated with xenomonitoring of onchocerciasis include ethical concerns on the use of human landing collections (HLCs), the urgent need for vector traps to replace HLCs, and algorithms that link transmission dynamics of HLCs with trap collections (when replacement traps are developed).
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Through the programme spending Dh4.8 million, 15.6 million children of school age are given treatment to eradicate intestinal worms and diseases such as schistosomiasis (also known as snail fever), soil-transmitted helminths (STH), river blindness (onchocerciasis), lymphatic filariasis (LF) and trachoma.
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Particularly in the area of lymphatic filariasis and onchocerciasis, preventative chemotherapy and the distribution of donated drugs that are free have been fantastic.
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The most important disease transmitted by black flies is human and animal onchocerciasis. It was experimentally proved that midges can be the vectors of tularemia and anthrax.
The key words included nematodes, ocular; filariasis, ocular; onchocerciasis, human and canine; loiasis; dirofilariasis, human, ocular, and dirofilariasis, canine.