Feline Leukemia (FeLV)

Feline leukemia (or FeLV) is the leading viral killer of cats. It weakens the immune system, increases susceptibility to other diseases, causes blood disorders and is the most common cause of cancer in cats. Symptoms Feline leukemia is sneaky. Cats may have no signs during early stages, and then over weeks, months or even years, health may progressively deteriorate. Or, an FeLV-positive cat ...

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.
Feline Leukemia

Feline leukemia is most common in young cats who go outdoors. Learn to recognize the signs and symptoms of feline leukemia , and how to care for an infected cat. Feline leukemia virus (FeLV) is a contagious retrovirus that suppresses immunity and causes severe illness. FeLV is spread through saliva ...
Diagnosing Feline Leukemia Since the signs and symptoms of FeLV can be like other medical conditions, the best way to diagnose it is to see your veterinarian immediately. As the disease progresses, it's normal for your cat to suffer from other medical conditions due to their compromised health, and it's easy to mistake the secondary condition for the main cause. Feline leukemia is detected ...

Feline Leukemia Virus (FeLV) Symptoms, Vaccine, Treatment
WebMD explains feline leukemia virus (FeLV), including symptoms , risk factors, treatments, and prevention.
Pete Wedderburn, DVM explains the causes, symptoms , and treatment of Feline Leukemia . Keep reading to demystify this condition.
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Feline Leukemia Symptoms
Learn about the common and advanced symptoms of feline leukemia , including weight loss, lymphoma, skin lesions, anemia, and organ failure. Understand how to diagnose and manage this viral disease.
Feline Leukemia Virus 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 Brochure
Feline leukemia virus adversely affects the cat's body in many ways. It is the most common cause of cancer in cats, it may cause various blood disorders, and it may lead to a state of immune deficiency that hinders the cat's ability to protect itself against other infections.








Feline leukemia virus (FeLV) is one of the most common infectious causes of disease of cats globally. Infection with FeLV can cause a variety of clinical signs, impacting a cat's longevity and quality of life. Vaccination and identification of infected cats is important in preventing disease transmission.