قالب:فيروسات قهقرية

Alpharetrovirus	Avian Sarcoma Leukosis Virus • Rous sarcoma virus
Betaretrovirus	Mouse mammary tumor virus • Jaagsiekte sheep retrovirus
Gammaretrovirus	Murine leukemia virus • Abelson murine leukemia virus • Friend virus • Feline leukemia virus • Xenotropic murine leukemia virus-related virus
Deltaretrovirus	Human T-lymphotropic virus (HTLV-1, HTLV-2) • Bovine leukemia virus
Epsilonretrovirus	Walleye epidermal hyperplasia virus
Lentivirus	HIV • SIV • FIV • Puma lentivirus • EIA • Bovine immunodeficiency virus • Caprine arthritis encephalitis virus • Visna/maedi virus
Spumavirus	SFV • HFV
أخرى	Metaviridae • Pseudoviridae

أخرى