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| *Women health>>>AIDS |
Where did AIDs and HIV originated or come from? |
What started it and how did it happen? I want serious answers only. No trolls, bigots, and/or ignorant answers please. Thanks It is now generally accepted that HIV is a descendant of a Simian Immunodeficiency Virus because certain strains of SIVs bear a very close resemblance to HIV-1 and HIV-2, the two types of HIV. HIV-2 for example corresponds to SIVsm, a strain of the Simian Immunodeficiency Virus found in the sooty mangabey (also known as the green monkey), which is indigenous to western Africa. The more virulent, pandemic strain of HIV, namely HIV-1, was until recently more difficult to place. Until 1999, the closest counterpart that had been identified was SIVcpz, the SIV found in chimpanzees. However, this virus still had certain significant differences from HIV. What happened in 1999? In February 1999 a group of researchers from the University of Alabama1 announced that they had found a type of SIVcpz that was almost identical to HIV-1. This particular strain was identified in a frozen sample taken from a captive member of the sub-group of chimpanzees known as Pan troglodytes troglodytes (P. t. troglodytes), which were once common in west-central Africa. The researchers (led by Paul Sharp of Nottingham University and Beatrice Hahn of the University of Alabama) made the discovery during the course of a 10-year long study into the origins of the virus. They claimed that this sample proved that chimpanzees were the source of HIV-1, and that the virus had at some point crossed species from chimps to humans. Their final findings were published two years later in Nature magazine2. In this article, they concluded that wild chimps had been infected simultaneously with two different simian immunodeficiency viruses which had "viral sex" to form a third virus that could be passed on to other chimps and, more significantly, was capable of infecting humans and causing AIDS. These two different viruses were traced back to a SIV that infected red-capped mangabeys and one found in greater spot-nosed monkeys. They believe that the hybridisation took place inside chimps that had become infected with both strains of SIV after they hunted and killed the two smaller species of monkey. They also concluded that all three 'groups' of HIV-1 - namely Group M, N and O (see our strains and subtypes page for more information on these) - came from the SIV found in P. t. troglodytes, and that each group represented a separate crossover 'event' from chimps to humans. This should cover all your ?s Source(s): http://www.avert.org/origins.htm... From African Simian viruses found in wild monkeys. I read that it was trasmitted from apes to humans in sub saharan africa. How, I will not elaborate upon. I believe that the usual statement is that it was transmitted from monkeys to humans in Africa. It is never explained how. I think it was probably through acts of bestiality or alternatively, butchering monkeys for eating. Then the infection was passed by anal intercourse. That does seem pretty clear. Some tribe in Africa ate some type of monkey that carried the virus but was unaffected. The tribe then spread the disease by sex to other people. My memory. Not sure on accuracy. |
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