• African green monkey simian foamy virus
• Avian carcinoma Mill Hill virus 2
• Avian leukosis virus
• Avian myeloblastosis virus
• Avian myelocytomatosis virus 29
• Avian sarcoma virus CT10
• Bovine foamy virus
• Bovine immunodeficiency virus
• Bovine leukemia virus
• Caprine arthritis encephalitis virus
• Chick syncytial virus
• Equine foamy virus
• Equine infectious anemia virus
• Feline foamy virus
• Feline immunodeficiency virus
• Feline leukemia virus
• Finkel-Biskis-Jinkins murine sarcoma virus
• Fujinami sarcoma virus
• Gardner-Arnstein feline sarcoma virus
• Gibbon ape leukemia virus
• Guinea pig type-C oncovirus
• Hardy-Zuckerman feline sarcoma virus
• Harvey murine sarcoma virus
• Human immunodeficiency virus 1
• Human immunodeficiency virus 2
• Jaagsiekte sheep retrovirus
• Kirsten murine sarcoma virus
• Koala retrovirus
• Langur virus
• Macaque simian foamy virus
• Mason-Pfizer monkey virus
• Moloney murine sarcoma virus
• Mouse mammary tumor virus
• Murine leukemia virus
• Porcine type-C oncovirus
• Primate T-lymphotropic virus 1
• Primate T-lymphotropic virus 2
• Primate T-lymphotropic virus 3
• Puma lentivirus
• Reticuloendotheliosis virus
• Rous sarcoma virus
• Simian foamy virus
• Simian immunodeficiency virus
• Snyder-Theilen feline sarcoma virus
• Squirrel monkey retrovirus
• Trager duck spleen necrosis virus
• UR2 sarcoma virus
• Viper retrovirus
• Visna/maedi virus
• Walleye dermal sarcoma virus
• Walleye epidermal hyperplasia virus 1
• Walleye epidermal hyperplasia virus 2
• Woolly monkey sarcoma virus
• Y73 sarcoma virus