Why do cats get feline leukemia FeLV?

Feline leukemia (FeLV) is a viral infection that affects cats. The virus responsible for FeLV is called the feline leukemia virus. Cats can become infected with FeLV through close contact with an infected cat, such as grooming, sharing food or water dishes, or through bite wounds.

FeLV cat. Image in public domain.

FeLV attacks the cat's immune system and can lead to various health problems, including anemia, cancers, and other infections. FeLV is most commonly found in cats that spend time outdoors, cats that live in multi-cat households, and kittens born to infected mothers.

Chart by MikeB.

Not all cats that come into contact with FeLV will become infected. The virus is relatively fragile and can be easily destroyed by most household disinfectants. It is important to vaccinate cats against FeLV and to test cats for the virus before introducing them to a household with other cats. Additionally, keeping cats indoors and limiting their exposure to potentially infected cats can reduce the risk of infection.