Cat Leukemia (Feline Leukemia Virus)

3 min read


Unfortunately, 85% of cats with FeLV die within three years of diagnosis.

There is no treatment or cure for feline leukemia. Treatment is directed at symptoms and often includes steroids, blood transfusion and supportive care when necessary. Some medications have shown promise in treating feline leukemia, including antivirals used in human AIDS treatment.

If your cat has no symptoms when she is diagnosed with FeLV, there is no treatment necessary apart from good at-home care.

If your cat is ill, feline leukemia makes it difficult for the cat’s body to respond to treatment. Your veterinarian will prescribe medication to treat the symptoms. Your cat may be hospitalized for severe secondary infections, low red-blood cell count, weight loss with muscle loss, or other symptoms as your veterinarian sees fit. In these cases, he will be kept under hospital care until his condition stabilizes. Emergency treatment, such as blood transfusions, is sometimes required.


Living and Management

You will need to monitor your cat for symptoms of infection and keep in touch with the veterinarian regarding follow-up treatment and testing. Treating minor signs of illness is especially important in a cat with known feline leukemia virus. Due to the virus, her body may be unable to appropriately respond to minor infections and other illnesses.

Cats with feline leukemia virus may have a normal lifespan if other illnesses can be prevented.

Keep FeLV-infected cats indoors and separated from healthy cats to prevent virus exposure and FeLV transmission. Good nutrition is important, as is controlling any secondary bacterial, viral or parasitic infections.



Keeping infected cats separated (and quarantining them) is the only way to 100 percent prevent cat leukemia in healthy cats. There is a vaccine against FeLV; however, it is important to test your cat before initial vaccination, as he  may already be infected. Even if you intend for your new kitten to be strictly indoors, most veterinarians will recommend including the FeLV vaccine in his kitten booster series. Cats can escape from the house and lifestyles change. It is important for your cat’s health that he be protected, and the vaccine poses very minimal risk.

A cat with feline leukemia should be kept strictly indoors and away from uninfected cats.  

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