Deltaretrovirus

The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species: • Deltaretrovirus bovleu, Bovine leukemia virus • Deltaretrovirus priTlym1, Primate T-lymphotropic virus 1 • Deltaretrovirus priTlym2, Primate T-lymphotropic virus 2 • Deltaretrovirus priTlym3, Primate T-lymphotropic virus 3 Two additional PTLVs are known but not recognized: HTLV-4 (South Cameroon, 2005) and STLV-5 (Mac B43 strain, highly divergent PTLV-1). In addition, eight endogenous retroviruses identified as Deltaretrovirus are known as of 2019. Two of these were complete enough to show ORFs; the rest only showing long terminal repeats. == Hosts ==

Known exogenous deltaretroviruses infect cattle and primates. The two complete endogenous ones were found in bats and dolphins; the others in Solenodon, mongoose, and fossa. These endogenous examples fill in the large gap in the host range. == Clinical relevance ==