Pet Symptom Checker

Feline leukemia

Medical name: FeLV, Feline "AIDS"

Emergency Warnings



  • Conjunctivitis
  • Diarrhea
  • Feverish
  • Muscle loss
  • Inflamed nose
  • Frequent ear infections


Leukemia in cats is undoubtedly caused by the feline leukemia virus (FeLV). An estimated two to three percent of cats in the United States are persistently infected with FeLV, which is spread in cat-to-cat contact. Cats must be hospitalized until stable. You should also keep your cat away from other cats until the infection is gone. Infected cats can remain in apparent good health (while still spreading the virus) for months, but most die of FeLV-related disease in 2 to 3 years. Your veterinarian can discuss the value of FeLV tests (ELISA and IFA tests for FeLV are available) and vaccination for your cat(s).

Zootoo does not provide veterinary medical advice, diagnosis, or treatment. Always seek the advice of a veterinarian with any questions you may have regarding your pet’s medical condition.
If you think your pet may be experiencing a medical emergency, call your veterinarian or an emergency animal care facility immediately.

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