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Feline Parvovirus | How It Spreads and Affects Cats

Feline Parvovirus

Discover all the essential information about Feline Parvovirus (FPV), also known as feline panleukopenia or feline infectious enteritis. Learn about its symptoms, treatment options, and download our comprehensive guide for more in-depth insights.

Feline Parvovirus (FPV) is a serious and highly contagious disease that can affect cats of all ages. In this article, we’ll guide you through everything you need to know about its symptoms, how it spreads, and the available treatment options. Whether you’re looking to protect your cat or care for one that may have been exposed, understanding FPV is crucial to keeping your feline friend healthy.

Feline Parvovirus (FPV) showing bacteria floating around an adult cats head.

What is feline parvovirus?

Feline panleukopenia, also known as feline distemper, is a dangerous disease caused by the feline parvovirus that severely affects a cat’s immune system. It is particularly harmful to young kittens, as it destroys blood cells, especially white blood cells, weakening their ability to fight infections. Outbreaks are still seen in homes with unvaccinated cats, as well as multi-cat environments like catteries. The virus can cause severe illness, and if a pregnant cat contracts the panleukopenia virus, her kittens may be born with brain damage. Intravenous fluids and nursing care are often required for infected cats, along with fluid therapy. Vaccines are available to help protect both kittens and adult cats, making it crucial for every cat to receive vaccination.

Which cats are at risk of feline panleukopenia?

Feline panleukopenia (FPV), also known as feline distemper is caused by the feline parvovirus, which attacks the immune system by destroying white blood cells. This virus is floating around in the environment, meaning nearly all cats and kittens are exposed to it at some point. Cats of any age can contract the panleukopenia virus, but it's dangerous for young kittens, sick cats, and those who are unvaccinated. newborn kittens as young as a few days of age are vulnerable, and infected cats often require intravenous fluid therapy and intensive nursing care. Cat breeds such as Siamese, Persian, and Bengal may be more at risk due to genetic factors. The virus can cause severe disease, but a vaccine is available to help protect both kittens and adult cats. It's essential for cats to receive vaccinations to build immunity and avoid the severe effects of this dangerous virus.

Three cats wearing medical masks to avoid catching feline parvovirus.

What are the symptoms of parvovirus in cats?

Not all cats infected with feline parvovirus, also known as feline panleukopenia or feline distemper, will show visible signs. However, you should be on the lookout for these symptoms in an infected cat:


  • Vomiting.
  • Watery diarrhoea, possibly with blood.
  • High fever in the early stages.
  • Loss of appetite.
  • Lethargy and signs of anxiety.
  • Abdominal pain.
  • Dehydration.
  • Rapid weight loss, underweight cat.
  • Difficulty breathing.
  • Weakness or collapse.

Kittens as young as a few days old are particularly at risk, and this virus can negatively impact their health. If you notice any of the above symptoms in your cat or kitten, especially in newborn kittens contact your vet right away. They may ask you to wait in the car to prevent spreading the disease to other cats. Since feline parvovirus is a highly contagious virus, making sure your cat is fully vaccinated is essential to protect against this deadly disease. Vaccines are available to help safeguard your cat from the feline parvovirus.

How is feline panleukopenia spread?

Infected cats can transmit feline parvovirus (FPV), also known as feline panleukopenia or feline distemper, through their feces, urine, and nasal secretions. Susceptible cats may contract the virus by coming into contact with these bodily fluids, the infected cat itself, or even fleas from an infected cat. Additionally, pregnant cats infected with the virus can pass it to their unborn kittens.

Other sources of infection include virus-contaminated objects such as:



The virus can spread rapidly, especially among kittens, and it’s important to ensure that your cat is vaccinated. Vaccines are available to protect against this dangerous disease.

Adult cat wrapped up in a cat blanket to keep warm, the cat is feeling sick.

Can feline parvovirus be treated?

While there is no cure for feline parvovirus, also known as feline panleukopenia or feline distemper, your vet can manage your cat’s symptoms as they recover. Treatment for feline parvovirus may involve:


  • A fluid drip to replace lost fluids due to vomiting and diarrhoea.
  • Antibiotics to treat any secondary bacterial infections.
  • Intensive care and nursing support if your cat is severely affected.

Since feline parvovirus is highly contagious, it's crucial to inform your vet if you have more than one unvaccinated cat in your home, as the virus is likely to spread.

If your cat has a mild case, your vet might provide guidance on how to care for them at home. During this period, it is vital to isolate your infected cat from other felines, particularly kittens, and ensure you thoroughly wash your hands and clean surfaces after handling your cat. Vaccinating your cat is key to preventing the spread of this highly contagious virus.

How can I stop my cat getting feline parvovirus?

To protect your cat from feline parvovirus, also known as feline panleukopenia or feline distemper, follow these essential steps:


  • Vaccination: The most effective way to prevent feline parvovirus is to ensure your cat is vaccinated. Kittens should start receiving their vaccines at 6-8 weeks of age, with booster shots according to your vet’s schedule. Adult cats also need regular booster vaccinations.
  • Limit Exposure: Keep your cat indoors or limit their interactions with other cats, especially if they are unvaccinated. This is crucial in environments where the virus may be present, such as shelters, boarding facilities, or areas with feral cats.
  • Hygiene: Clean and disinfect your cat's living area regularly, including litter boxes, feeding stations and water bowls, and cat beds. The virus can survive in the environment for long periods, so maintaining cleanliness is key.
  • Quarantine New Cats: If you bring a new cat into your home, ensure they are vaccinated and healthy before introducing them to other cats. Keep them separated until their vaccination status is confirmed.
  • Regular Vet Visits: Take your cat for regular veterinary checkups to ensure they are in good health and up-to-date with their vaccinations.

By following these steps, you can significantly reduce the risk of your cat contracting feline parvovirus.

A cat at the vets, really sick from the Feline parvovirus.

How is feline panleukopenia diagnosed

Feline panleukopenia, also known as feline parvovirus or feline distemper, is diagnosed through a combination of the following methods:


  • Clinical Signs and History: Your vet will evaluate your cat's symptoms, such as vomiting, diarrhoea, lethargy, fever, and loss of appetite, along with their vaccination history. These signs can raise suspicion of feline panleukopenia, especially in unvaccinated kittens.
  • Blood Tests: A common indicator of feline panleukopenia is a low white blood cell count (leukopenia), which weakens the cat's immune system. Blood tests help detect this decrease in white blood cells, which is often associated with the disease.
  • Fecal Testing: Your vet may perform a fecal test to check for the presence of the feline panleukopenia virus. This test can detect viral particles in the cat's stool.
  • PCR Testing: A Polymerase Chain Reaction (PCR) test is sometimes used to detect the virus’s genetic material. This is a more sensitive test that can confirm the presence of the panleukopenia virus even in early stages of infection.
  • Imaging: In severe cases, your vet may use imaging techniques like X-rays to check for intestinal damage caused by the virus, as feline panleukopenia can affect the lining of the intestines.

Early diagnosis is essential for treatment, so if you suspect your cat may have feline panleukopenia, contact your vet immediately.

Can kittens get parvovirus?

Yes, sadly, kittens are less likely to survive a parvovirus infection. They are more vulnerable to feline parvovirus due to their underdeveloped immune systems at such a young age.


If a kitten's mother has been vaccinated, she may pass some temporary immunity to her kittens during pregnancy. However, this protection fades quickly, so it’s essential to vaccinate the kittens as soon as they reach the appropriate age, typically around eight to nine weeks.

A kitten in bed wearing a medical mask, infected with the feline parvovirus.

How can feline panleukopenia be prevented?

Young kittens are very vulnerable to infection with feline panleukopenia, also known as feline parvovirus or feline distemper. If the mother cat has antibodies against the virus, she can pass some immunity to her newborn kittens through her milk. This maternal immunity offers vital protection during the early weeks of life, but it reduces over time. It's essential to vaccinate kittens once this immunity begins to decline. However, if kittens are vaccinated before the mother provided immunity drops to a certain level, it can interfere with their response to the vaccine, meaning even vaccinated kittens may occasionally become infected with the virus.


To provide the best defense against feline parvovirus, a series of vaccinations is recommended during the first few months of a kitten's life. The feline panleukopenia vaccine is part of a combination vaccine (often referred to as FVRCP), which also protects against feline herpesvirus 1 and feline calicivirus. This "core" vaccine is essential for all cats, including those that live indoors and don't regularly interact with other cats.


Kittens younger than 16 weeks should receive their first vaccine dose between 6 and 8 weeks of age and continue to receive booster shots every 3 to 4 weeks until they are 16 to 20 weeks old. Cats older than 16 weeks that have never been vaccinated or have an unknown vaccination history should receive one or two doses, with the second dose administered 3 to 4 weeks after the first.


To maintain immunity, a booster shot is recommended at 6 months of age, followed by annual boosters for the intranasal vaccine or every 3 years for the injectable vaccine. If your adult cat hasn’t been vaccinated or is overdue for vaccines, it's not too late to start. Consult your veterinarian for a vaccination plan tailored to your cat's age and needs.


In addition to vaccination, other measures can help prevent the spread of feline panleukopenia and other infectious diseases:


  • Avoid contact with infected cats or contaminated areas.
  • Keep your cat indoors to reduce the risk of exposure to potentially infected animals.
  • Wash or sanitize your hands after handling other cats, especially those showing signs of illness.
  • Don’t share cat toys, puzzle feeders, or other items between your cat and cats of unknown health or vaccination status.
  • When introducing a new cat or kitten into a household with other cats, keep them separated until they are examined by a vet and vaccinated.
  • If you have a sick cat, isolate them from other cats and disinfect contaminated surfaces using a solution of 1/2 cup household bleach in 1 gallon of water, applied for at least 10 minutes.

By following these precautions and keeping your cat up to date with vaccinations, you can greatly reduce the risk of infection from this deadly virus.

Cartoon showing how litter trays and food bowls become infected with Feline Parvovirus.

Can humans and dogs catch feline parvovirus?

No, humans and dogs cannot catch feline parvovirus. Feline parvovirus, also known as feline panleukopenia, is species specific and only affects cats. However, while humans and dogs are not susceptible to this virus, canine parvovirus can occasionally affect cats, though this is rare.

Key Points

  • Feline panleukopenia, caused by feline parvovirus, is a highly contagious and often fatal viral disease in cats.

  • Most infections with feline parvovirus are subclinical, meaning they show no visible symptoms. However, cats that do become ill often exhibit high fever, severe lethargy, and loss of appetite. Vomiting is common, and some cats may develop diarrhea, though hemorrhagic diarrhea is less frequent.

  • Diagnosis is based on clinical signs, such as leukopenia, especially in kittens that have not been adequately vaccinated. Fecal antigen detection kits for diagnosing canine parvovirus can also be used to identify feline parvovirus, offering moderate sensitivity and high specificity.

  • Treatment includes supportive care with fluids, electrolytes, glucose, antiemetics, antibiotics, and anthelmintics. Vaccines are highly effective at preventing infection from both feline parvovirus and canine parvovirus.

FAQ

Can feline parvovirus be cured?

Feline parvovirus cannot be cured, but supportive treatment can help cats recover. This includes fluids, medication for symptoms, and antibiotics to prevent infections. Early care improves survival, but vaccination is the best prevention.

How long can a cat live with feline parvovirus?

A cat's survival with feline parvovirus depends on the severity of the infection and how quickly treatment begins. Without treatment, the virus can be fatal within 24 to 48 hours of severe symptoms appearing. However, with prompt and intensive care, some cats may recover within a week. Kittens and unvaccinated cats are at the highest risk, and early intervention is crucial for survival.

What are the first signs of panleukopenia in cats?

The first signs of panleukopenia in cats often include:

  1. High fever.
  2. Lethargy and depression.
  3. Loss of appetite.
  4. Vomiting.
  5. Diarrhoea (sometimes watery or bloody).

Will boiling water kill feline panleukopenia?

Yes, boiling water can help kill the feline panleukopenia virus. The virus is quite resilient and can survive in the environment for long periods, but heat, such as boiling water, can effectively destroy it. For disinfection, using a bleach solution (1:32 ratio of household bleach to water) is also highly effective in killing the virus on surfaces.

Can indoor cats prevent getting feline parvo or other serious illnesses?

Keeping cats indoors can significantly reduce their risk of contracting feline parvovirus (feline panleukopenia) and other serious illnesses. Indoor cats are less exposed to infected animals, contaminated environments, and parasites that spread disease. However, indoor cats can still be at risk, especially if exposed to new cats or contaminated objects.

How long does feline parvovirus last?

Feline parvovirus can last for a long time in the environment. The virus is extremely resilient and can survive for months to a year on surfaces such as bedding, food bowls, litter boxes, and even floors. It can persist in various conditions, making it highly contagious.


If a cat becomes infected, the illness typically lasts for about 5 to 7 days after symptoms begin. However, the most critical period for survival is usually within the first 48 to 72 hours of showing symptoms.


To prevent the virus from lingering, thorough cleaning and disinfection with a bleach solution are essential.

Kelly Rushton with her cat Eddie Stafford.

Kelly Rushton

Meet Kelly Rushton, a dedicated cat enthusiast and proud owner of Feline Fancy Ltd. With a heart as big as her household, Kelly is the loving mum to 10 charming Ragdoll cats. In her world, felines reign supreme, and she brings professionalism and warmth to everything she does. Through her blog, Kelly shares her wealth of knowledge and experiences, offering insights into cat care, behavior, and the joy of living alongside these majestic creatures.


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