Yahoo Poland Wyszukiwanie w Internecie

Search results

  1. Phylogenetic analyses have revealed the origins of HIV-1: chimpanzees were the original hosts of this clade of viruses; four lineages of HIV-1 have arisen by independent cross-species transmissions to humans and one or two of those transmissions may have been via gorillas.

  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.

  3. 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

  4. 1 cze 2018 · Subsequent molecular sequencing has indicated that the HIV epidemic probably originated in central Africa in the early 20th century, when there were multiple cross-species transmission events of a similar lentivirus from primates to humans, most likely through hunting practices.

  5. 1 sty 2024 · HIV-2 viruses result from at least nine independent transmissions of SIVs infecting sooty mangabeys (Cercocebus atys) from West Africa leading to HIV-2 groups A to I. These HIV variants have different virological and epidemiological histories.

  6. 28 lip 2006 · 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).

  7. 1 wrz 2023 · 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.