1) Mammalian Type C retrovirus:
Feline leukaemia virus (FeLV)
Feline sarcoma virus
Porcine type C oncovirus
2) Mammalian Type D retrovirus:
Sheep pulmonary adenomatosis /Jaagsiekte
3) Avian type C retroviruses - Avian leukosis virus (ALV)
5) BLV-HTLV retroviruses - Bovine leukosis virus (BLV)
6) Lentivirus:
Feline immunodeficiency virus
Bovine immunodeficiency virus
Visna- Maedi (Maedi-Visna) virus (of sheep) (V-MV)
Caprine- arthritis- encephalitis virus
Equine infectious anaemia virus (swamp fever) (EIA)
Human immunodeficiency virus