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SIV(Simian immunodeficiency virus)

 SIV also known as African Green Monkey virus. SIV is also a lentivirus, it is close homolog of HIV 1.Transmission mechnisms are same as the HIV-1 .SIV genome has 6 genes env, gag, pol, nef, vif and vpx. [Pathogenic and nonpathogenic SIV infections share some major features: high viral replication, massive acute depletion of mucosal CD4(+) T cells, and partial control of the virus by both adaptive and innate immune responses]. [The later stages of SIV infection turn into SAIDS, much as human HIV infection turns into AIDS.]