Chrysops Health Dictionary

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Chrysops: From 1 Different Sources

n. a genus of bloodsucking flies, commonly called deer flies. Female flies, found in shady wooded areas, bite humans during the day. Certain species in Africa may transmit the tropical disease *loiasis to humans. In the USA C. discalis is a vector of *tularaemia.
Health Source: Oxford | Concise Colour Medical Dictionary
Author: Jonathan Law, Elizabeth Martin

Loa Loa

Filarial nematodes transmitted by the horse fly (Chrysops) in west central Africa. Causes loiasis, characterised by fugitive, subcutaneous (Calabar) swellings.... loa loa

Loiasis

Loiasis is the disease caused by the ?larial worm Loa loa, a thread-like worm which di?ers from

W. bancrofti in that it is shorter and thicker, and is found in the bloodstream during the day, not at night. It is transmitted by the mango ?y, Chrysops dimidiata, but other ?ies of this genus can also transmit it. It is con?ned to West and Central Africa. The characteristic feature of the disease is the appearance of fugitive swellings which may arise anywhere in the body in the course of the worm’s migration through it: these are known as Calabar swellings. The worm is often found in the eye, hence the old name of the worm in Africa – the eye worm. Diethylcarbamazine is the treatment for this form of FILARIASIS.... loiasis

Deer Fly

see Chrysops.... deer fly

Loa

n. a genus of parasitic nematode worms (see filaria). The adult eye worm, L. loa, lives within the tissues beneath the skin, where it causes inflammation and swelling (see loiasis). The motile embryos, present in the blood during the day, may be taken up by bloodsucking Chrysops flies. Here they develop into infective larvae, ready for transmission to a new human host.... loa

Tularaemia

(rabbit fever) n. a disease of rodents and rabbits, caused by the bacterium Francisella tularensis, that is transmitted to humans by deer flies (see Chrysops), by direct contact with infected animals, by contamination of wounds, or by drinking contaminated water. Symptoms include an ulcer at the site of infection, inflamed and ulcerating lymph nodes, headache, aching pains, loss of weight, and a fever lasting several weeks. Treatment with chloramphenicol, streptomycin, or tetracycline is effective.... tularaemia

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