Happy Silly Cat

FIP in Cats: Understanding the Fatal Viral Disease

Feline Infectious Peritonitis: A Fatal Viral Disease in Cats

As a cat owner, it is important to be aware of the potential health risks that your furry friend faces. One such disease that can be fatal to cats is Feline Infectious Peritonitis, commonly known as FIP.

In this article, we will explore the essential aspects of FIP, including its definition, causes, transmission, and prevention methods. We will also cover the main symptoms of FIP in cats, including wet and dry forms.


Feline Infectious Peritonitis (FIP) is a fatal viral disease that affects cats worldwide. The disease is caused by a mutation of the Coronavirus.

While the majority of cats infected with Coronavirus do not develop FIP, cats with weakened immune systems may be susceptible to the disease. FIP primarily affects cats under the age of two, but adult cats can also get the disease.

FIP can manifest in two primary forms: wet and dry FIP.


The cause of FIP is a mutation of the Coronavirus that primarily affects cats. Most often, this virus is transmitted to cats through infected feces or litter boxes in multi-cat households and shelters.

Mother cats can also pass the virus to their kittens. The virus can survive for up to a week outside of the cat’s body.

When a cat’s immune response to the mutated virus is compromised, it can develop FIP.


Coronavirus, the primary cause of FIP, is transmitted via contact with the feces of an infected cat. Cats can contract FIP through contact with infected litter boxes, surfaces, and bedding.

Multi-cat households are particularly at risk, as are crowded shelters. Mother cats can also pass the virus to their kittens through their milk.


Preventing FIP starts with keeping your cat’s environment clean. Regular litter box cleaning and disinfection of surfaces can help reduce the risk of your cat contracting the virus.

Keeping your cat in a stable cat group and avoiding overcrowded areas can also help reduce the risk of contracting FIP. Vaccines are available for some types of Coronavirus, but they are not always effective.

It is best to consult with a veterinarian to determine the best course of action for your cat.

Symptoms of FIP in Cats

The symptoms of FIP can vary depending on whether the cat has wet or dry FIP. Let’s take a look at the most common symptoms of each form.


Wet FIP manifests as a buildup of fluid in the abdomen and/or chest, making it harder for the cat to breathe. Other symptoms of wet FIP can include a distended abdomen, general lethargy, and a lack of appetite.

The cat may also experience a fever, jaundice, vomiting, diarrhea, eye problems, incoordination, and seizures.


Dry FIP, on the other hand, affects organ tissues and can cause a range of symptoms affecting different organ systems, including:

– Lethargy

– Weight loss

– Wobbliness

– Breathing problems

– Eye problems

– Neurological symptoms, such as seizures

Common Symptoms

Both wet and dry FIP can have common symptoms, such as fever, vomiting, diarrhea, and jaundice. Physical symptoms can include incoordination or limping.


In conclusion, Feline Infectious Peritonitis is a viral disease that poses a significant risk to cats. It is important for cat owners to be aware of the disease and the ways it can be contracted and prevented.

Symptoms of FIP can vary depending on whether the cat has wet or dry FIP and can be severe. If you suspect that your cat may have FIP, it is crucial to seek veterinary care immediately.

With proper prevention strategies and early intervention, we can help protect our furry feline friends from this fatal disease.

Diagnosis of FIP in Cats

Feline Infectious Peritonitis is a complex and challenging disease to diagnose in cats. The symptoms of FIP are often nonspecific, making it difficult for veterinarians to differentiate the disease from other illnesses.

In this section, we will explore the different methods of diagnosing FIP in cats, including blood tests, FELV/FIV tests, and sampling fluids. We will also cover the confirmatory tests used in detecting the virus responsible for FIP.

Blood Tests

A complete blood count (CBC) test can provide insight into a cat’s overall health. A high white blood cell count and anemia are often seen in cats with FIP.

Changes in albumin and globulin levels can also be indicative of FIP. These tests are often the first step in diagnosis, but they cannot confirm FIP on their own.


Feline leukemia virus (FELV) and feline immunodeficiency virus (FIV) tests are vital to ruling out concurrent illnesses in the diagnostic process. Cats with FELV and/or FIV are more susceptible to FIP, and their weakened immune system can complicate the diagnosis.

These tests can also help determine if immunosuppressive medications, like steroids, can be safely used during treatment.

Sampling Fluids

As mentioned earlier, wet FIP manifests as fluid build-up in the abdomen and/or chest. Veterinarians can use abdominal and/or chest fluid samples to test for the presence of the virus responsible for FIP.

A procedure called aspiration can be performed to obtain fluid samples. An ultrasound can be useful in locating the site of fluid accumulation and guiding the needle for aspiration.

These samples are then subjected to laboratory testing.



Confirming the diagnosis of FIP requires external laboratory testing. Often, the results can be inconclusive, which is why the other diagnostic methods mentioned earlier are crucial in ruling out other conditions.

Single tests are often not enough, and a combination of tests and clinical signs aid in the final diagnosis.

Treatment for FIP in Cats

Treating Feline Infectious Peritonitis remains a significant challenge for veterinarians and cat owners alike. Unfortunately, there is currently no known cure for the disease, and cats diagnosed with FIP have a poor prognosis.

In this section, we will explore the different approaches to FIP treatment, including supportive treatment and the new treatment options.



Supportive treatment is a form of palliative care used to manage the symptoms of FIP and improve a cat’s quality of life. Steroids and chemotherapy can be used to suppress the immune response and limit inflammation.

Supportive feeding, vitamin injections, and probiotics can be helpful in supporting the cat’s nutritional needs and immune system. It is important to note that supportive treatment does not cure the disease and only manages clinical signs.



In recent years, there has been a new breakthrough in the fight against FIP. Researchers have discovered a new antiviral drug, GS-441524, that can effectively combat the virus that causes FIP.

Although the drug is not widely available in veterinary practice, there are isolated case reports of successful treatment at considerable expense. The drug is administered as an injection and has been shown to cure some cases of wet FIP.

Life Expectancy

Unfortunately, the prognosis for cats with FIP remains poor, and there is no cure for the disease. Cats with wet FIP typically have a lifespan of weeks to a few months after diagnosis.

Dry FIP is slower progressing, but long term survival is rare.

Treatment can help improve a cat’s quality of life, but it is not a cure, and there are no guarantees in terms of extended life expectancy.


Overall, Feline Infectious Peritonitis is a challenging disease to diagnose and treat in cats. The best defense is prevention through cleanliness and vaccination.

Although there is no known cure for FIP, cat owners can still provide supportive treatment and care for their furry friends diagnosed with the disease. The recent breakthrough in antiviral treatment provides hope for future effective treatments and potential cures.

Veterinary care and support are crucial in managing the symptoms of FIP, ensuring that cats with FIP have the best possible quality of life given their condition.

Costs Associated with FIP in Cats

Feline Infectious Peritonitis is a tricky disease to diagnose and treat, and cat owners may incur significant costs associated with the diagnosis, treatment, and easing of pain for their furry friend. In this section, we will explore the expenses associated with FIP, including diagnosis, treatment, and pain management.


Diagnosing FIP can often be a lengthy and complex process, which can lead to increased costs. The severity of the case and the number of tests required can add to the financial burden.

Diagnostic tests like bloodwork, FELV/FIV tests, and fluid sampling can range from a few hundred to a few thousand dollars. Diagnostic imaging, such as ultrasound, can also be costly.


Treatment options for FIP are limited and can be expensive, ranging from a few thousand to tens of thousands of dollars. Hospital stays can be lengthy, with some cats requiring weeks of hospitalization and critical care.

Treatment usually involves supportive treatment and medication, including fluids, antibiotics, steroids, and chemotherapy.

Treatment options are purely symptomatic and aimed at improving a cat’s quality of life.

Easing Pain

Easing pain in cats diagnosed with FIP can be less costly than general treatment, but the costs can still add up. Steroid treatment is a popular form of pain relief for cats with FIP.

Steroid treatment usually involves injections, which can range from $50 to $300 per injection, depending on the cat’s weight and the severity of the condition.

Conclusion and



Feline Infectious Peritonitis is a fatal disease that can be challenging to prevent, diagnose, and treat. The disease can be devastating to cat owners both emotionally and financially.

The chances of a cat recovering from FIP are low, and even with the best supportive treatment, cats will eventually succumb to the disease.


FIP is an immune-compromising disease and not always entirely preventable. However, there are steps cat owners can take to reduce their cat’s chances of contracting the disease.

One step is to prevent overcrowding in multi-cat households, as this can predispose healthy cats to disease and stress. Keeping litter boxes clean and disinfected is also important, as FIP can be transmitted from the feces of infected cats.

Reducing the spread of coronavirus can also help prevent FIP, as cats with weaker immune systems are more susceptible to the virus that triggers FIP. Waiting before getting another pet after losing a cat to FIP is also recommended.


Feline Infectious Peritonitis remains a challenging disease to prevent, diagnosis, and treat. While diagnosis and treatment can be costly, there is no price tag for the emotional toll the disease takes on cat owners.

Prevention measures such as keeping litter boxes clean and reducing exposure to coronavirus can help reduce the risk of FIP. Cat owners should always consult with their veterinarians and seek the best possible care for their feline friends, bearing in mind that FIP is a disease with a poor prognosis.

Feline Infectious Peritonitis is a fatal viral disease that affects cats worldwide. The disease is caused by a mutation of the Coronavirus that primarily affects cats, with wet and dry FIP as the two primary forms.

Diagnosing and treating FIP can be costly, and cat owners usually incur significant expenses for testing, treatment, and pain management. Unfortunately, FIP remains a challenging disease to treat, and cats have a poor prognosis.

Prevention measures such as reducing coronavirus spread and keeping litter boxes clean are crucial in reducing the risk of FIP. While FIP is devastating, cat owners can seek comfort in knowing that they have provided the best possible care for their furry friends.

Popular Posts