Retroviridae RNA tumor virus group Onvirinae RNA肿瘤病毒亚科 Rous sarcoma virus Murine sarcoma virus Mouse mammary tumor virus Retrovirus Maedi/visna group Lentivirinae 慢病毒亚科含有酶的 RN病毒 HNl,HⅣ Sheep visna virus Equine infectious anemia virus Foamy virus group Spumavirinae 泡沫病毒亚科 Human foamy virusRetrovirus Rous sarcoma virus Murine sarcoma virus Mouse mammary tumor virus RNA tumor virus group Onvirinae HIV I, HIV II Sheep visna virus Equine infectious anemia virus Maedi/Visna group Lentivirinae Human foamy virus Foamy virus group Spumavirinae Retroviridae 含有逆转酶的 RNA病毒 RNA肿瘤病毒亚科 慢病毒亚科 泡沫病毒亚科