Simulium(redirected from Eusimulium)
Also found in: Dictionary, Thesaurus.
A genus of biting gnats or midges, the black flies, humpbacked flies, or buffalo gnats in the dipteran family Simuliidae. The aquatic larvae require swift-flowing streams or highly oxygenated waters for their development, a critical epidemiologic factor in the role of these flies as disease vectors. In Central and South America, Mexico, and across central Africa, various species transmit Onchocerca volvulus, agent of human onchocerciasis.
[L. simulo, to simulate]
Any of various black flies of the genus Simulium, several species of which transmit the parasitic filarial worms that cause onchocerciasis.