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. 2005 Dec;113(12):A822–A827. doi: 10.1289/ehp.113-a822

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Focusing on onchocerciasis. — When parasites spread by blackflies (above) enter the body, their larvae migrate to the eyes and skin, causing lesions that result in inflammation, bleeding, and severe visual impairment or blindness if left untreated treated (right top). Treatment with ivermectin (right bottom) has reduced the disease in most areas and nearly eradicated it in some.