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blackfly

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blackfly

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Black fly (Simuliidae)
(credit: E.S. Ross)
Any member of the insect family Simuliidae, comprising 300 species of small, humpbacked dipterans found worldwide. Usually black or dark gray, the blackfly has short mouthparts adapted for sucking blood. The females bite and are sometimes abundant enough to kill chickens and even cattle. Some species carry worms capable of causing human disease, including river blindness. In subarctic regions blackflies may be so numerous that human habitation is impossible.



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Scientists hailed the findings a "historic milestone" in the fight against the disease also known as river blindness, because it is spread by blackfly which breeds in rivers.
Onchocerciasis is also called river blindness because the blackfly which transmits the disease breeds in fast flowing rivers, and blindness is the most incapacitating symptom of the disease which also causes debilitating skin disease.
The worms spread throughout the body, and when they die, they cause intense itching and a strong immune system response that can destroy nearby tissue, such as the eye In a number of countries, onchocerciasis has been controlled through spraying of blackfly breeding sites with insecticide.
 
 
 
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