Devastating consequences of FIV and FelLV infection in cat. Blood ELISA test detected both specific antiviral antibodies at this unvaccinatedyoung cat. The animal is brought to our vet clinic in a bad physical conditionwith decreasedimmunity,skin lesions, petechialhemorrhage,anemia, diarrhea, loss of appetite, various infectionsof the skin, bladder and respiratorytract, and fever. Feline immunodeficiency virus (FIV) and feline leukemia virus (FeLV) cause two diseases with similar symptomes- immune system declines,cats become susceptible to life- threateninginfectionsand certain types of cancer. The primary route of transmissionfor both viruses is bite wounds. Treatmentis often symptomatic- dealing with complicationsand infections,it has to be quick and aggresive. That is why I recommend everyone one to go for vaccination as per schedule.