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.
Feline leukemia is caused by the feline leukemia virus. This virus is shed in infected cats through their saliva, urine, feces, and if they are lactating, their milk, too.The other way to prevent feline leukemia in your cat is to keep your cat away from infected cats.

Feline leukemia virus (FeLV) is one of the most common and important infectious diseases in cats, affecting between 2-3% of all cats in the United States and Canada. Infection rates are significantly higher (up to 30%) in cats that are ill or otherwise at high risk (see below).

Feline Leukemia Virus Diagnosis. FeLV diagnosis in cats cannot be established based on clinical signs alone because they are similar to other diseases.Feline Leukemia - A striped cat with green eyes is sitting in the garden. Chronic Lymphocytic Leukemia Treatment.

Although a diagnosis of Feline Leukemia Virus can be emotionally devastating, it is important to realize that cats with FeLV can live normal lives for prolonged periods.