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1 cze 2021 · Explain how HIV evolved from cross-species transmission of strains of simian immunodeficiency virus (SIV) to humans (viral zoonosis), spread out of Africa in the early 20th century, and eventually resulted in the global AIDS pandemic
5 maj 2003 · HIV-1 group M has subsequently spread globally, generating the pandemic observed today. Here, we investigate the epidemic history of HIV-2 to test previously suggested hypotheses of its origin. We provide the first estimated dates of cross-species transmissions of HIV-2.
1 lut 2017 · From Africa, HIV rapidly spread in the late 1960s to the Caribbean and then the United States, Europe, and other areas of the world, leading to the global AIDS pandemic. Both HIV-1 and HIV-2 descended genetically from Simian immunodeficiency virus via cross-species transmission.
HIV-2 originated in SIVsm of sooty mangabeys (Cercocebus atys), and its even more numerous cross-species transmission events have yielded HIV-2 groups A to H (2, 3).
1 sty 2011 · Human immunodeficiency viruses (HIV), the causative agents of AIDS, are the results of multiple viral cross-species transmissions from nonhuman primates to humans. 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.
1 wrz 2023 · 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 the butchering and eating of bush meat. This chapter reviews the origin of HIV and its entry into humans as well as the different strains and subtypes of HIV.
28 lip 2006 · Although the interspersal of SIVcpz and SIVsm in the molecular phylogeny of HIV-1 and HIV-2, respectively, reveals successful cross-species transmission events, there are a surprisingly limited number of documented cases, and direct evidence of a simian-to-human transmission is still missing.
