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Feline Immunodeficiency Virus (FIV) and Feline Leukemia Virus (FeLV)

Feline Immunodeficiency Virus (FIV) and Feline Leukemia Virus (FeLV) cause two highly contagious and potentially fatal diseases. The American Association of Feline Practitioners and this veterinary facility recommend that all cats be tested regardless of previous negative test results, prior FeLV vaccinations or age.

Signs of Infection

  • Fever
  • Gingivitis (bleeding gums)
  • Weight loss
  • Vomiting
  • Diarrhea
  • Stomatitis (mouth sores)
  • Abscesses (infected wounds)
  • Dehydration (not drinking water)
  • Lethargy ("not doing well")
  • Swollen lymph nodes
  • Behavioral changes
  • Grooming changes
  • Eating changes
  • Poor hair coat (dull, matted)
  • Bite wounds

Risk Factors

  • Unneutered male cats
  • Fighting cats
  • Outside unsupervised
  • Contact with other cats
  • Newly adopted
  • Whenever they are sick
  • When status is unknown


Studies have shown that as many as one in four cats with any of these signs may be positive for FIV or FeLV.

Please ask us for information on updating your cat's FIV and FeLV status.