Betaretrovirus

Betaretrovirus
Virus classification
Group:	Group VI (ssRNA-RT)
Order:	Unassigned
Family:	Retroviridae
Subfamily:	Orthoretrovirinae
Genus:	Betaretrovirus
Type species
Mouse mammary tumor virus
Species
Jaagsiekte sheep retrovirus Langur virus Mason-Pfizer monkey virus Mouse mammary tumor virus Squirrel monkey retrovirus

Betaretrovirus is a genus of the Retroviridae family. It has type B or type D morphology. The type B is common for a few exogenous, vertically transmitted and endogenous viruses of mice; some primate and sheep viruses are the type D.

Examples are the mouse mammary tumour virus, enzootic nasal tumour virus (ENTV-1, ENTV-2), and simian retrovirus types 1, 2 and 3 (SRV-1, SRV-2, SRV-3).