Tlhaloso e qaqileng
Feline leukemia virus (FeLV) ke kokoana-hloko ea retrovirus e atileng haholo har'a likhama lefatšeng ka bophara.Leukemia ea feline ke lefu le bolaeang le sa tloaelehang la likatse, e leng lefu le tšoaetsanoang le kotsi le bakoang ke kokoana-hloko ea leukemia le kokoana-hloko ea sarcoma ea feline.Likarolo tse ka sehloohong ke malignant lymphoma, myeloid leukemia, le degenerative thymus atrophy le non-aplastic anemia, eo har'a eona e mpe ka ho fetisisa bakeng sa likatse ke malignant lymphoma.Likatse li na le ts'oaetso e kholo mme li fokotseha ka lilemo.
Feline HIV (FIV) ke kokoana-hloko ea lentiviral e tšoaetsang likatse lefatšeng ka bophara, 'me 2.5% ho isa ho 4.4% ea likatse li tšoaelitsoe.FIV e fapane ka mokhoa o fapaneng le li-retrovirus tse ling tse peli, feline leukemia virus (FeLV) le feline foam virus (FFV), 'me e amana haufi-ufi le HIV (HIV).Ho FIV, li-subtypes tse hlano li 'nile tsa khetholloa ho latela phapang ea tatellano ea nucleotide encoding viral envelope (ENV) kapa polymerase (POL).Li-FIV ke tsona feela li-lentivirus tseo e seng tsa primate tse bakang lefu le kang la AIDS, empa FIV ha se hangata li bolaeang likatse hobane li ka phela hantle ka lilemo tse ngata e le bajari le ba fetisang lefu lena.