FIV is characterized by a persistent viral infection in cats that can cause immune deficiency resulting in reoccuring infections and less commonly, anemia, low white blood cell counts and cancer. Cats with FIV are usually healthy in the early stages of infection, with the FIV infection being detected during a physical exam.

As the infection persists, signs can include lethargy; weakness; variable appetite; recurrent skin, gum, intestinal or bladder infections; enlarged lymph glands; weight loss; vomiting; diarrhea; difficulty breathing or cloudy eyes.

Most cats become infected with FIV when they are bitten while fighting with an infected cat. All kittens and cats should be tested for FIV during a routine physical examination. Please see your veterinarian for more information.