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1 sty 2018 · This entry focuses on the current knowledge about how HIV-2, the second and more benign form of the human immunodeficiency virus, is transmitted (“HIV-2 Transmission”). First, the origin and geographical distribution of HIV-2 transmission over time will be discussed.
1 cze 2021 · All strains of HIV-1 and HIV-2 are genetic descendants of simian immunodeficiency viruses (SIVs). Initial cross-species transmission of the virus occurred from butchering and eating of bush meat. HIV-1 group M (“main”) and associated viral subtypes (A–L) account for approximately 95% of infections globally, with a much smaller number ...
5 maj 2003 · The main goal of this study was to provide a timescale for the HIV-2 interspecies transmissions and to investigate the epidemic history in its putative geographical origin.
1 lut 2017 · Both HIV-1 and HIV-2 descended genetically from Simian immunodeficiency virus via cross-species transmission. HIV-1 group M was the first lineage discovered and represents the pandemic form of the virus.
1 sty 2004 · HIV-1 has its origin in chimpanzees and is the result of three separate transfers to humans; by contrast, HIV-2 is most closely related to strains in the sooty mangabey and is the result of at...
1 sty 2011 · Simian immunodeficiency viruses (SIVs) from chimpanzees and gorillas from west-central Africa have crossed the species barrier on at least four occasions leading to HIV-1 in humans. HIV-2 viruses result from at least eight independent transmissions of SIVs infecting sooty mangabeys from West Africa.
While a number of controversial theories attempt to explain the origin of HIV/AIDS, phylogenetic evidence suggests a zoonotic transmission of HIV to humans and implicates the chimpanzee (Pan troglodytes troglodytes) as the source of HIV-1 infection and the sooty mangabey as the source of HIV-2 infection in human populations.
