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Enlarge ImageRelative similarities. Gombe chimps infected by SIVcpz have a remarkably high death rate and evidence of AIDS-like immune damage.Credit: Michael Wilson MONTREAL, CANADA--Researchers have long assumed that SIVcpz, the chimpanzee virus that infected humans and triggered the AIDS epidemic, caused no harm to the apes. But new data presented here today at the 16th Conference on Retroviruses and Opportunistic Infections reveal that wild chimps infected with SIVcpz are more likely to die than uninfected chimps. The animals also show AIDS-like damage to their immune systems. The finding raises the possibility that chimps, too, are suffering from an AIDS...

The origin of HIV has been found in wild chimpanzees living in southern Cameroon, researchers report. A virus called SIVcpz (Simian Immunodeficiency Virus from chimps) was thought to be the source, but had only been found in a few captive animals. Now, an international team of scientists has identified a natural reservoir of SIVcpz in animals living in the wild. The findings are to be published in Science magazine. It is thought that people hunting chimpanzees first contracted the virus - and that cases were first seen in Kinshasa, in the Democratic Republic of Congo - the nearest urban area...