[viruses]
   Order Ortervirales
     Family Retroviridae
       Subfamily Orthoretrovirinae
         Genus Lentivirus
           01 Bovine immunodeficiency virus
           02 Caprine arthritis encephalitis virus
           03 Equine infectious anemia virus
           04 Feline immunodeficiency virus
           05 Human immunodeficiency virus 1ᵀ
           06 Human immunodeficiency virus 2
           07 Jembrana disease virus
           08 Puma lentivirus
           09 Simian immunodeficiency virus
           10 Visna-maedi virus