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21-Feb-2020 03:43 by 9 Comments

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Exc Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.AIDS is caused by a human immunodeficiency virus (HIV), which originated in non-human primates in Central and West Africa.

of SIV or HIV (post mutation), the virus was transmitted from an ape or monkey to a human when a hunter or bushmeat vendor/handler was bitten or cut while hunting or butchering the animal.

Using HIV-1 sequences preserved in human biological samples along with estimates of viral mutation rates, scientists calculate that the jump from chimpanzee to human probably happened during the late 19th or early 20th century, a time of rapid urbanisation and colonisation in equatorial Africa. Some molecular dating studies suggest that HIV-1 group M had its most recent common ancestor (MRCA) (that is, started to spread in the human population) in the early 20th century, probably between 19.

A study published in 2008, analyzing viral sequences recovered from a recently discovered biopsy made in Kinshasa, in 1960, along with previously known sequences, suggested a common ancestor between 18 (with central estimates varying between 19).

The resulting exposure to blood or other bodily fluids of the animal can result in SIV infection.

Prior to WWII, some Sub-Saharan Africans were forced out of the rural areas because of the European demand for resources.

Since rural Africans were not keen to pursue agricultural practices in the jungle, they turned to non-domesticated meat as their primary source of protein.

This over-exposure to bushmeat and malpractice of butchery increased blood-to-blood contact, which then increased the probability of transmission.

They all seem to derive from independent transmissions from sooty mangabeys to humans.

Groups C and D have been found in two people from Liberia, groups E and F have been discovered in two people from Sierra Leone, and groups G and H have been detected in two people from the Ivory Coast.

While various sub-groups of the virus acquired human infectivity at different times, the global pandemic had its origins in the emergence of one specific strain – HIV-1 subgroup M – in Léopoldville in the Belgian Congo (now Kinshasa in the Democratic Republic of the Congo) in the 1920s.

The pandemic strain of HIV-1 is closely related to a virus found in chimpanzees of the subspecies Pan troglodytes troglodytes, which live in the forests of the Central African nations of Cameroon, Equatorial Guinea, Gabon, Republic of Congo (or Congo-Brazzaville), and Central African Republic.

Sample analyses resulted in little data due to the rarity of experimental material.

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