French Researchers on Monday found a new type of HIV virus that is hard to detect by conventional tests that comes from Gorillas and has many biological properties linked for human infections, according to Nature Medicine journal.

Researchers detected said the new virus is related to the simian virus that occurs in chimpanzees but not closely related to the other three HIV variants.

Analysis on the virus' rapid replication confirmed that it is adapted to human cells. It could be easily spread unnoticed, the researchers said. It can jump from species to species, from primate to primate, and that includes humans.

The 62-year-old Cameroonian woman was also tested positive for HIV in 2004 after moving to Paris from Cameroon, though currently shows no signs of AIDS and remains untreated according to the researchers.