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FIV & FeLV in Cats: Symptoms, Differences, and Long-Term Management

07 January 2026
1 min read
FIV & FeLV in Cats: Symptoms, Differences, and Long-Term Management

Hearing "your cat is FIV positive" or "FeLV positive" from a vet is one of the most frightening moments for a cat owner. Many immediately think euthanasia is necessary. But this is not always true.

Understanding FIV and FeLV

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🔵 FIV — Feline Immunodeficiency Virus

  • Gradually suppresses the immune system
  • Cats can live normally for years
  • Transmission: biting (especially street male cats)
  • Does not spread to humans
  • No cure, but manageable

🟠 FeLV — Feline Leukemia Virus

  • Attacks bone marrow and immune system
  • Worse prognosis than FIV
  • Transmission: casual contact (grooming, shared food bowls)
  • Can cause cancer (lymphoma)
  • Preventive vaccine available

Long-Term Management of FIV/FeLV-Positive Cats

  1. Make them fully indoor cats — reduces exposure to infections from outside
  2. Regular vet check-ups every 6 months — blood tests to monitor organ function
  3. Appropriate routine vaccination — avoid live vaccines, use killed vaccines
  4. Premium and controlled nutrition — cats with weakened immunity are very vulnerable to infections from contaminated raw food
  5. Isolate from FIV/FeLV-negative cats or ensure all cats in the household are vaccinated
  6. Treat secondary infections promptly — never wait for "self-healing" in an immunosuppressed cat

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Frequently Asked Questions

Can FIV spread to humans?
No. Feline Immunodeficiency Virus (FIV) only infects cats — it does not spread to humans, dogs, or other animals. You are safe caring for and petting an FIV-positive cat. The risk is to other cats in the household that are unvaccinated or have open wounds.
What is the main difference between FIV and FeLV?
FIV (similar to HIV in humans) slowly suppresses the immune system — cats can live for years without symptoms. Main transmission: biting (fighting male cats). FeLV is more aggressive — it attacks bone marrow, can cause anemia, leukemia, and severe immunosuppression. Transmission: casual contact (mutual grooming, shared food bowls). FeLV has a worse prognosis than FIV.
Can FIV/FeLV cats live with other cats?
For FIV: yes, as long as the cats get along well (no biting each other). Other cats should ideally be vaccinated against FIV if available. For FeLV: the risk is higher as transmission can occur through casual contact. Ideally separate, or all cats in the household should be vaccinated against FeLV and tested regularly.
Is there a vaccine for FIV and FeLV?
FeLV vaccine is available and recommended for all cats with exposure risk (outdoor, multi-cat households). Effectiveness is 70–80%. FIV vaccine is available in some countries but is not standard in Indonesia. FIV/FeLV testing is recommended for all new cats before joining an existing cat household.
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Medically Reviewed by

Birawa Vet Medical Team

This article has been verified by our medical team to ensure veterinary information accuracy.

Medical Disclaimer

The information in this article is for general educational purposes only and is not a substitute for direct consultation with a veterinarian.

Every pet has unique conditions. Do not hesitate to seek professional help if your pet is sick.

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