Feline leukemia virus (FeLV) is a retrovirus that infects cats. FeLV can be transmitted from infected cats when the transfer of saliva or nasal secretions is involved.
Diagnosing Feline Leukemia Virus. Your veterinarian can diagnose the disease by conducting a simple blood test called an ELISA, which identifies FeLV proteins in the blood. This test is highly sensitive and can identify cats with very early infections.
Learn important information about cat leukemia, including how it spreads, common symptoms, testing & diagnosis info, treatments and prevention options.

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Feline Leukemia Virus (FeLV) is a common but preventable virus that can affect almost all cats. Dr. Boldan shares how FeLV weakens a cat's immune system, symptoms, and how the feline leukemia virus vaccine can be life-saving.
While some cats can live a healthy life, with a normal lifespan, other cats can have a mortality rate of around 50% in 2 years and 80% in 3 years. How Does Feline Leukemia Spread From Cat To Cat? Photo of a group of cats with potential for feline leukemia transmission.

In-depth Information on Leukemia in Cats. The acute form of lymphocytic leukemia is called acute lymphoblastic leukemia, or ALL. Pets with ALL are generally very ill, and begin to show clinical signs of illness fairly suddenly. Patients with ALL will often have a fever.