Scientists now say that the simian immunodeficiency virus (SIV) in chimpanzees (Pan troglodytes), which is believed to have been transmitted to humans to become HIV-1—the virus that causes AIDS—didn't start its life in chimps. 11 июн. 2003 г.
Which type of HIV is present in chimpanzee?
Moreover, we find that HIV-1 group N is a mosaic of SIVcpzUS- and HIV-1-related sequences, indicating an ancestral recombination event in a chimpanzee host. These results, together with the observation that the natural range of P. t.
What wild animal did HIV come from?
In Africa, HIV–the virus that causes AIDS–had jumped from chimpanzees to humans sometime early in the 20th century. To date, the earliest known case of HIV-1 infection in human blood is from a sample taken in 1959 from a man who'd died in Kinshasa in what was then the Belgian Congo.
How did the chimps get SIV?
In 2003, Bailes and colleagues* suggested that the chimpanzee form of SIV arose as a result of recombination of monkey strains of SIV acquired by chimpanzees who prey on those monkeys.
How did SIV turn into HIV?
Scientists suspect that once SIV was in humans it evolved into HIV via random mutation. The initial transmission of the virus from chimpanzees to humans appears to have occurred in Africa sometime between 1884 and 1924.
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