the feline immunodeficiency virus (fiv) is a lentivirus initially isolated from a cat of a cattery in the u.s.a (1986). the virus is similar in it's characters to human immunodeficieny virus (hiv) fiv exists endemically between domestic cats and has been recogniced in many countries. however, the incidence and prevalence status of f1v have not been reported yet in iran. on the basis of pre...