Quick answer
Key points
- Panleukopenia is caused by feline parvovirus and is often fatal, especially in kittens under 5 months old.
- The virus spreads through faeces, vomit and body fluids, and is carried on hands, shoes, clothing and cat equipment.
- The virus can survive indoors for up to about a year and is not killed by many common disinfectants.
- The panleukopenia vaccine is a core vaccine for every cat, including cats that always stay indoors.
- Panleukopenia does not infect people, and this cat virus does not cause disease in dogs.
When should you see a vet?
- Contact a vet immediately if your cat or kitten is vomiting, has diarrhoea or a fever, is lethargic or will not eat, especially if its vaccinations are not complete.
- Signs of dehydration, such as sunken eyes or dry gums.
- A painful belly, or a cat that is very dull and reluctant to move.
- Several cats in the same home or neighbourhood falling ill or dying suddenly within a short time.
- A pregnant cat that is unwell, miscarries or gives birth to stillborn kittens.
- A kitten that walks unsteadily, is uncoordinated or trembles when it moves.
Contact your nearest veterinarian or animal clinic. This site cannot assess your animal’s condition. Choosing a vet
In this guide (11)
What is feline panleukopenia?
Feline panleukopenia is a highly contagious and often fatal viral disease of cats, caused by feline parvovirus (FPV). It is also known as feline distemper or feline infectious enteritis. The name means a shortage of all types of white blood cell. The virus attacks fast-dividing cells, especially in the bone marrow, lymphoid tissue and gut lining. This weakens the immune system and damages the intestine. Panleukopenia does not infect people, and this cat virus does not cause disease in dogs. However, newer strains of canine parvovirus can infect cats, and panleukopenia vaccines also protect cats against them.
Evidence: Cornell Feline Health Center — Feline Panleukopenia Virus ↗ · Merck Veterinary Manual (Cat Owners) — Feline Panleukopenia ↗ · Merck Veterinary Manual — Feline Panleukopenia ↗
What are the signs of panleukopenia in cats?
The common signs of panleukopenia are fever, lethargy, loss of appetite, vomiting and diarrhoea, which can quickly lead to severe dehydration. Signs usually appear 2–7 days after exposure. Vomiting often comes first, while diarrhoea does not always occur. Dehydration may show as sunken eyes or dry gums, and the belly may be painful. In kittens, severe infection can cause sudden death with little or no warning. In pregnant cats, the virus can cause miscarriage or stillbirth. Kittens infected in the womb may suffer damage to the cerebellum, leaving them with a wobbly gait and tremors for life.
Evidence: Merck Veterinary Manual (Cat Owners) — Feline Panleukopenia ↗ · Cornell Feline Health Center — Feline Panleukopenia Virus ↗ · Merck Veterinary Manual — Feline Panleukopenia ↗
How does panleukopenia spread?
Panleukopenia spreads through the faeces, vomit, urine and nasal secretions of sick cats, either by direct contact or via contaminated objects. Cages, litter trays, food and water bowls, toys, bedding, shoes and clothing can all carry the virus. Fleas from infected cats can also spread it. The virus is very hardy and can survive indoors for up to about a year without proper disinfection. This is why cats that never go outside can still be infected. Recovered cats can shed the virus in their faeces for up to six weeks, so they should be kept away from unvaccinated cats.
Evidence: Cornell Feline Health Center — Feline Panleukopenia Virus ↗ · ABCD (European Advisory Board on Cat Diseases) — Guideline for Feline Panleukopenia ↗ · Merck Veterinary Manual (Cat Owners) — Feline Panleukopenia ↗
Why are kittens most at risk of panleukopenia?
Kittens are most at risk because the antibody protection they get from their mother is only temporary, while their own vaccinations are not yet complete. Antibodies from the mother's milk protect them early in life, but cannot be relied on beyond 6–8 weeks of age. These antibodies can also block vaccines given too early. Kittens under 5 months old are the most likely to die from the disease. In Indonesia, studies in Yogyakarta and Madiun found that cats aged 6 months or younger, unvaccinated cats and bringing a new cat into the home were linked to panleukopenia. The Yogyakarta study also found higher risk in cats that went outdoors or came from pet shops, markets or the street.
Risk is also high in street cat colonies and in cats with little access to preventive care, especially where there are many kittens. In shelters, outbreaks are common when cats are not vaccinated on arrival. Because the death rate is so high, the loss of many community cats in a short time is sometimes mistaken for mass poisoning. If you care for or feed street cats, watch for cats that are lethargic, vomiting or have diarrhoea. Separate sick cats from the others where possible, wash your hands after handling them, and get help from a vet promptly.
Evidence: Cornell Feline Health Center — Feline Panleukopenia Virus ↗ · Merck Veterinary Manual (Cat Owners) — Feline Panleukopenia ↗ · Merck Veterinary Manual — Feline Panleukopenia ↗ · Jurnal Sain Veteriner (UGM) — Faktor Risiko Feline Panleukopenia pada Kucing di Daerah Istimewa Yogyakarta ↗ · Jurnal Medik Veteriner (Universitas Airlangga) — Retrospective Study of Feline Panleukopenia Risk Factors in Pet Cats in Madiun ↗
When and how often should cats be vaccinated against panleukopenia?
Kittens usually start vaccination at 6–8 weeks of age, with repeat doses every 2–4 weeks until they are 16 weeks old or older. The 2024 WSAVA guidelines list the panleukopenia vaccine as a core vaccine for every cat worldwide, alongside the herpesvirus and calicivirus vaccines. WSAVA also advises a further dose at 26 weeks of age or later, because in some kittens the mother's antibodies still block the earlier doses. After that, panleukopenia vaccination is generally repeated no more often than every three years, as your vet advises. Adult cats that were never vaccinated, or whose history is unknown, can still be protected.
The vaccine is also recommended for cats that always stay indoors, because the virus can be carried in on objects, shoes and clothing. The Blitar Regency livestock and fisheries office lists panleukopenia among the diseases that cat vaccination prevents, and advises owners to visit their nearest vet. It also advises vaccinating only when the cat is healthy: a normal body temperature, a good appetite, and no diarrhoea, coughing or sneezing. Ask your vet for a schedule that suits your cat's age, vaccination history and surroundings.
Evidence: WSAVA — 2024 Guidelines for the Vaccination of Dogs and Cats ↗ · Cornell Feline Health Center — Feline Panleukopenia Virus ↗ · Merck Veterinary Manual — Feline Panleukopenia ↗ · Dinas Peternakan dan Perikanan Kabupaten Blitar — Pentingnya Vaksinasi pada Hewan Peliharaan ↗
Can a cat recover from panleukopenia?
Some cats do recover, but usually only with intensive veterinary care, and many still die, especially kittens. There is no specific medicine that kills the virus. Vets give supportive care, such as intravenous fluids and medicines to control the signs, often in an isolation ward in hospital. Published reports show that only about 20–51% of cats treated in hospital survive. The chance of recovery depends on age, general health, how severe the illness is and how quickly treatment starts. Do not try to treat the cat yourself at home. Cats that recover usually have lifelong immunity, but can still spread the virus for several weeks.
Evidence: Cornell Feline Health Center — Feline Panleukopenia Virus ↗ · Merck Veterinary Manual — Feline Panleukopenia ↗ · Merck Veterinary Manual (Cat Owners) — Feline Panleukopenia ↗
How do you clean your home after panleukopenia?
First clean away faeces and other organic matter, then use a disinfectant proven to kill parvovirus, because many common disinfectants do not work. According to the ABCD guideline, the virus is inactivated by products containing sodium hypochlorite (bleach), peracetic acid or aldehydes. The Cornell Feline Health Center advises household bleach diluted 1:32 and left on surfaces for at least 10 minutes. Quaternary ammonium products are often ineffective, even when their labels claim to kill parvovirus. Use disinfectant only on surfaces and objects, never on the cat, and follow the label. Throw away items that cannot be disinfected. Ask your vet when it is safe to bring a new cat home.
Evidence: ABCD (European Advisory Board on Cat Diseases) — Guideline for Feline Panleukopenia ↗ · Cornell Feline Health Center — Feline Panleukopenia Virus ↗ · Merck Veterinary Manual — Feline Panleukopenia ↗
Sources & references
- Cornell Feline Health Center — Feline Panleukopenia Virus ↗
- Merck Veterinary Manual (Cat Owners) — Feline Panleukopenia ↗
- Merck Veterinary Manual — Feline Panleukopenia ↗
- ABCD (European Advisory Board on Cat Diseases) — Guideline for Feline Panleukopenia ↗
- Jurnal Sain Veteriner (UGM) — Faktor Risiko Feline Panleukopenia pada Kucing di Daerah Istimewa Yogyakarta ↗
- Jurnal Medik Veteriner (Universitas Airlangga) — Retrospective Study of Feline Panleukopenia Risk Factors in Pet Cats in Madiun ↗
- WSAVA — 2024 Guidelines for the Vaccination of Dogs and Cats ↗
- Dinas Peternakan dan Perikanan Kabupaten Blitar — Pentingnya Vaksinasi pada Hewan Peliharaan ↗
References can change. Check dates and context in the original source.
Cite this page
PanduanHewan. (2026, 25 September). Feline panleukopenia: signs, spread and vaccination. PanduanHewan.org. https://panduanhewan.org/en/pet-health/feline-panleukopenia/