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This disease affects mainly the eyes & skin. It's caused by worms transmitted through the bite of infected black flies.

ONCHOCERCIASIS is the 2nd leading infectious cause of blindness globally but many people know nothing about it.

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The black fly which causes onchocerciasis breeds mainly in fast-flowing rivers & streams.

This happens mainly in remote villages in the tropics located near fertile lands where people rely heavily on farming or herding. Adult black fly (Simulium damnosun)
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The female adult worms produce #larvae (microfilariae) that migrate to the skin, eyes & other organs.

One female worm can release up to 1000 larvae a day into surrounding tissue.

The worms can live up to 15 years in the human body enclosed in fibrous tissues called #nodules.
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