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University of Pennsylvania
HIV strain came from gorillas, study finds
HIV strain came from gorillas, study finds

Western lowland gorillas in southern Cameroon appear to be the source for the second-most-lethal category of the immunodeficiency virus that crossed into humans, a new study suggests. The category, called HIV-1 group O, has not been nearly as dangerous to humans as group M, which has infected more than 40 million people worldwide. But its origin and history had been a mystery. Using nearly 3,000 fecal samples from gorillas in several western and central African countries, researchers reported Monday that they pinpointed the source population for group O, which infected 100,000 in west-central Africa, and for the exceedingly rare group P, which infected only two people.  The simian...

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