<virology> A genus of the family retroviridae consisting of non-oncogenic retroviruses that produce multi-organ diseases characterised by long incubation periods and persistent infection. Lentiviruses are unique in that they contain open reading frames (orfs) between the pol and env genes and in the 3' env region. Five serogroups are recognised, reflecting the mammalian hosts with which they are associated. HIV-1 is the type species.
(12 Dec 1998)
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