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LONDON (AP) - The parasite that causes river blindness, a crippling disease endemic in Africa, may be developing resistance to the one drug used to treat it, according to research published Friday in The Lancet.
The discovery could force public health officials to rethink strategies for controlling river blindness, also known as onchocerciasis.
In The Lancet study, researchers tested 2,501 people in disease-endemic regions of Ghana from 2004 to 2005, and found 19.5 percent had the worms that cause river blindness.
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