Sarman the cat, FIP, September 13, 2017

FIP (Feline Infectious Peritonitis)

If you started searching for FIP (Feline Infectious Peritonitis) on the Internet and stumbled upon this page, I am really sorry for you. Perhaps your or your family’s cat (or a friend’s, or a relative’s cat) is diagnosed with the disease. I know how do you feel, now you are really sorry, your heart is broken, you feel empty and helpless, and you are searching for a possible cure for this horrible disease. I can understand your feelings because I recently lost my beloved “Sarman” to FIP. And now I am devastated.

Related: A Promising Research about possible future FIP treatment

What is FIP

FIP is a fatal disease that affects cats. It is caused by a mutation of feline enteric coronavirus (FECV) or simply Feline coronavirus (FCoV). Coronavirus is highly contagious and common but in fact not harmful itself. Most infected cats do not develop FIP. But, in some rare cases, the Feline Coronavirus mutates into Feline Infectious Peritonitis virus (FIPV) – and… it is hard to say that because I know how it hurts, but, there is no known cure for FIP and very, very few survivors of the disease.

Sarman the cat, FIP, September 13, 2017
I recently lost my beloved “Sarman” to FIP. This photo was taken on September 13, 2017, nine days before his death.

When the Feline coronavirus mutates into FIPV, the cat’s immune system produces antibodies that are supposed to protect the cat. With the “assistance” of these antibodies, white blood cells get infected with the virus, and these cells then transport the virus throughout the cat’s body – then an intense inflammatory reaction occurs around vessels in the tissues where these infected cells locate, often in the abdomen, kidney, or brain.

Despite the name of the disease contains “Infectious”, actually it is not highly contagious at all. Coronavirus is highly infectious.

Signs and Symptoms

Diagnosing FIP is challenging. Despite the claims made by some laboratories and test manufacturers, there is currently no test that can distinguish between the harmless intestinal coronavirus and the deadly FIP coronavirus. A positive test may support the veterinarian’s suspicions, but by itself is inconclusive. It means only that a cat has been exposed to and may be harboring a coronavirus. A negative test usually (but not always) indicates that the cat is unlikely to have FIP.

The earliest signs are the lack of appetite, fewer, weakness, weight loss, jaundice, and diarrhea. Another early sign that I noticed: my lovely boy, Sarman, started lying down on warm places like working PC cases or laptops on his belly. Before he got ill, he usually slept in funny and very cute positions – but suddenly he started to look for this kind of warm places to rest, and lying down on them on his belly. A very, very bad symptom which is an indicator that something was really wrong. He also started eating less and less every day. He stopped playing, even started not paying attention whatever goes around him at all. A few days later, he stopped cleaning (licking) himself.

It’s like a switch – something in my lovely boy just switched off.

There are two types of FIP: Effusive (wet) and non-effusive (dry). In fact, both types are fatal, but the effusive form is more common (60-70% of all cases are wet) and progresses more rapidly than the non-effusive form. It is also far more deadly. Almost all of the survivors (of which there are very few) developed the dry form. Unfortunately, again, Sarman has developed the wet form.

The hallmark clinical sign of effusive FIP is the accumulation of fluid within the abdomen or chest. I first noticed his lack of appetite and weakness on August 21. In the early September, liquid started accumulating in his belly. This accumulated liquid squeeze the lungs, cause breathing difficulties and make the cat’s life even worse.

Dry FIP will also present the same signs (i.e. lack of appetite, fever, weakness, weight loss) but there will not be an accumulation of fluid. Typically a cat with dry FIP will show ocular or neurological signs. For example, the cat may develop difficulty in standing up or walking, becoming functionally paralyzed over time. Loss of vision is another possible outcome of the disease.

In overall, FIP signs and symptoms are:

  • Pain or swelling of the abdomen (wet form)
  • Weight loss (both forms)
  • Lethargy, tiredness and weakness (both forms)
  • Appetite loss (both forms)
  • Seizures and paralysis (dry form)
  • Inflammation of the eyes (dry form)
  • Vomiting, diarrhea, constipation (dry form)


Unfortunately, there’s no cure for FIP. Treatment is symptomatic and palliative only. What only you can do is making the cat as comfortable as possible. Effusive FIP (wet form) usually progresses too rapidly, as in my Sarman’s case, for any meaningful therapy to be attempted.

Life Expectancy

In the effusive or wet form, not very much. Perhaps days, or a few weeks. My lovely boy was gone one month after I noticed the first signs of this horrible disease. In the dry form, the life expectancy is higher. I know a cat who diagnosed with dry FIP in January 2016 and as of September 2017, she was still alive.

Update: as of August 2018, she is still well and alive. But I am suspecting if she was really FIP at all. I think it might be a false positive.

What can you do

To avoid FIP

First of all, there is no single laboratory test available that can point decisively to FIP. But there are tests like ELISA or IFA to detect if your cat has been in contact with the virus and has developed antibodies to it. If the result of the test is negative, then you are lucky – your cat(s) never contacted with the virus. But, in the future, if you decide to take a new cat, before introducing it to your house cats, take it to your veterinarian and make sure that s/he is also corona negative. If it is corona positive, I would not recommend taking her/him. Because, in any cat infected with FECV (feline coronavirus), there is a chance that the virus may mutate into the FIP-causing form FIPV.

In short, protecting your cat(s) from coronavirus infection dramatically decreases the likelihood of cats developing FIP. You should keep litter box(es) clean and locate them away from food and water. Clean feces from the litter daily and disinfect the box(es) regularly – maybe once a week. Preventing overcrowding, keeping cats current on vaccinations, and providing proper nutrition can also help decrease the occurrence of FIP in groups of cats.

If your cat is diagnosed with FIP

The hard truth again: FIP is incurable. All you can do is making the cat as comfortable as possible, as explained above. And please try to be with her/him as much as possible. You’ll probably be regretful if you don’t do so.

Is quarantine necessary?

It depends on the situation. If other cat(s) around are Corona positive, no quarantine needed. As explained above, coronavirus is infectious, not FIP. The coronavirus must undergo a mutation in order to lead to FIP. But if other cat(s) are corona negative, yes, you should quarantine the sick cat. You don’t want to make your other cat(s) corona positive. Once a cat is infected with the coronavirus, there will always be a chance (5 to 10 percent, most sources say) that the virus to mutate and the infected cat to develop FIP.

FIP and Polyprenyl immunostimulant (PI)

An experimental polyprenyl immunostimulant is being manufactured by Sass and Sass in Tennessee, United States. It is classed as a biologic by the USDA. According to the Sass and Sass website they are conducting research on its use for FIP and other diseases of companion animals. Although not currently approved for the treatment of FIP by the USDA, it is being widely used off-label for prolonging the life of cats with milder forms of FIP.

According to the UC Davis Veterinary Medicine, “it has not shown any benefit for treating or prolonging the life of cats with wet FIP or cats with severe disease signs at the onset of therapy. Although touted on the web and by certain individuals as a way to prolong the life of cats with FIP, in particular, the milder dry forms, it is important to review what is known about the efficacy of PI when used for this purpose. PI may cost over $400 a month if used on an average size cat and dosed accordingly and this expense can be magnified by associated veterinary expenses.”

I would recommend you to read the whole article, and make your own decision to use it or not. I do not live in the United States, and there was no chance to find the stimulant where I live in (Istanbul). In fact, Sarman’s health condition deteriorated very rapidly. There was just not enough time… Even there was enough time, after reading the article on Davis’ website, I am really skeptical about that stimulant.

FIP Vaccine

There is only one licensed FIP vaccine available; however, this vaccine has minimal if any effect in preventing FIP, and it is not generally recommended by the American Association of Feline Practitioners Feline Vaccine Advisory Panel. Primucell FIP, produced by Pfizer Animal Health, is a temperature-sensitive, modified-live virus vaccine that is given as an intranasal vaccine and is licensed for use in cats at least 16 weeks of age.

Not generally recommended – the American Association of Feline Practitioners has grouped vaccines for cats into three general categories:

  1. Core, means all cats should receive the vaccine.
  2. Non-core, means recommendation is based on risk for exposure to the disease
  3. Not generally recommended, means have little or no indication.

The FIP vaccine has been included in this third category. Being in the “not generally recommended” category does not mean the vaccine is bad or dangerous, it simply means that widespread use is not generally recommended among pet cats. If the FIP vaccine is used, antibody testing before vaccination is advised, since cats that have already been exposed and have antibodies don’t benefit from vaccination.

So, the vaccine appears to be safe, but the risks and benefits of vaccination should be weighed carefully. You should consult your veterinarian to help you decide if your cat(s) should be vaccinated.

Story of Sarman

In August 2016, at the North campus of the Bosphorus University, Istanbul (where I work in), I saw a cute, little orange kitten. He was so tiny, so vulnerable. But he was also very timid, scared of everything and everybody – dogs, other cats, people, even me. When I try to give some food to him, he was running away. He was only eating the food after I walked away a bit. Sometimes I was waiting for a certain distance to enable him to eat his food. Because dogs were around.

One morning, while I was walking fast, I noticed that something, something little, was clinging to my leg. I looked down – it was him! The cute little kitten was so hungry that his hungriness has overcome his fear. And he recognized me and decided to beg for some food. It was a very emotional moment for me. I gave him some food, he started scoffing. He was adorable! After he finished eating, I took him to my office.

Sarman the orange cat - first meeting (August 16, 2016)
The first day with Sarman, August 16, 2016. He had a problem in his eyes – which I treated in a few days.
Sarman the orange cat - first day at the office (August 16, 2016)
The first day at the office (August 16, 2016). He’d already started sleeping in the cutest positions.

After that day, he never left my side. He went wherever I go in the campus. He was waiting for me at our office door every morning, and after eating his food, he was sleeping by my side. Sometimes on my desk, sometimes on my lap.

Sarman the orange cat, August 22, 2016
Sarman the orange cat, August 22, 2016. His eyes were much better after the treatment.

In the video below, I am playing with my lovely boy. It was September 16, 2016. I didn’t know I’d lost him almost a year later.

Sarman the orange cat (October 20, 2016)
October 20, 2016. Playing with my little boy. I really miss his beautiful eyes.
Sarman the orange cat, December 7, 2016
December 7, 2016. My lovely Sarman is sleeping on my desk. He was already looking like a grown-up cat.
Sarman the orange cat, December 16, 2016
December 16, 2016. Sarman is watching the first snow of the year at my office.

He also had friends. The video below was shot in last winter. The calico cat, who is licking Sarman is Korsan (meaning “pirate”, because she is missing one of her eyes). Sarman was the gentlest cat I ever saw. He was always kind to humans and to other cats.

Sarman the orange cat, June 15, 2017
June 15, 2017. Summer is about to begin. Sarman is enjoying the warm weather.

In the summer of 2017, the FIP has shown its ugly head in our campus (North campus of the Bosphorus University). We lost many cats (mostly kittens, but also a mother cat, her babies were already dead). I feared that my lovely boy would get sick, so I decided to take him home. It was a hard decision because I already have 4 cats at home, and they don’t like the newcomers. Anyway, I took Sarman to the vet for tests. Unfortunately, he was corona positive. My fur babies at home were negative. So I didn’t take the risk.

Unfortunately, on August 21, 2017, I realized something wrong with him. He was less active, eating less. First I thought it was temporary. But, on August 26, I decided to take him to vet. They first said that it was bacterial. I was hopeful. But, his condition was getting worse and worse. On September 5, the veterinary said that he’d developed FIP. Wet form. Terminal. Nothing could be done anymore.

I took him back to the university on the same day. Because there was nothing the vet can do anymore. I wanted him by my side, in his last days. I wanted him to see the sky, the sun, the trees for a few days more.

Sarman the orange cat, August 11, 2017
The last healthy photo of Sarman. Taken on August 11, 2017. Just in ten days, he’d get terminally ill.

He spent his last days in the neighborhood that he loved. Unfortunately, his condition got worse and worse. His belly started getting bigger and bigger. He stopped eating completely. I was feeding him with a syringe. But he was getting skinnier and skinnier. It was really hurting to see him like that.

Sarman the orange cat, September 21, 2017
This photo was taken on September 21 at around 20:00. It was his last photo. In a few hours, he would be dead.

On September 21, he was so sick that I knew he was going to die. He was hardly breathing, so I and friends took him to the vet. They gave him oxygen. But…

We left him at the vet and I returned home at 1:00 am. At 1:30, the vet called me. My baby was gone. Forever. I started crying.

We buried him the next day. We were in tears…

Thank you for reading this. As I said before, I am also really, really sorry for you and your cat. For me, it was really hard to write this article. Every word broke something inside me. I still love him and miss him. Still, after a few weeks he has gone, I still sometimes crying. Knowing that I lost him, forever… it really, really hurts…


22 thoughts on “FIP (Feline Infectious Peritonitis)”

  1. Hello, I have just read your sad story regarding Sarman. It sounds like he had met a real friend in you and you made a huge difference to his life. Sadly I am reading these stories as my little boy Max has been diagnosed with FIP. He is only 9 months old, we got him from a shelter 6 months ago and right from the start he was hungry, ate, ate and ate. Stole food from the kitchen, off our plates whenever he could. We thought this was comical, but I fear all the time he was hungry because of this awful disease already working on his insides. He took ill 15.2.18 and we first took him to the vet 17.2.18 for diarrohea, by 20.2.18 his belly was getting bigger and they mentioned FIP which I had never even heard of. Positive diagnosis on 23.2.18 and tonight we are brokenhearted as he has become so ill, and so thin (apart from the belly) tomorrow morning he will be put to sleep. It is so sad, as he is still eating a little and is still purring when he gets loved. He has no energy and is also so sad. he is going downhill fast and I would like him to go to sleep before he gets worse and feels pain. So glad you and Sarman found each other, he looked like a lovely boy

    1. I am really sorry. I know how do you feel. It’s still so hard to me… Sorry for the late answer, probably you already put him to sleep… Really, really sorry… I know how it hurts. I am crying while I writing this…

      1. Thank you so much. He was put to sleep on 27 Feb 2018 as his breathing was getting worse and we didn’t want him to suffer. Broke our hearts. He is buried in our garden. His life was short but he was well loved. I too am crying writing this

  2. I am reading this in tears. I rescued my sweet Duct Tape from a local shelter a month ago. I (and the shelter) assumed he was a layed back chill kinda cat. Within days of bringing him home he started eating less and less. The vet first treated him with antibiotics and steroids because he discovered a fractured tooth. My sweet boy continued to become weaker and weaker, eating very little and getting so thin, yet his stomache was so swollen. He passed away just a few days ago. My heart hurts so bad. Even after a few weeks, I miss the little guy so.

  3. Thank you so much for writing this, I started sobbing at your words. My mother recently passed away, and I felt getting a new kitten would help heal my heart. His name is Reboot, as a gesture towards life starting over and trying to reset after my loss. This morning I got a call from my vet to tell me Reboot, now 15 weeks old and weighing only 3.5 pounds, likely has FIP. We will go in for an ultrasound and fluid withdrawal to further test, but based on previous lab work, two neurological events, and his lack of interest in playing or eating, all signs point to FIP. I am devastated, and feel utterly helpless. I’m sorry you had to go through this yourself, but wanted to let you know that your writing helps me feel less alone. Thank you.

    1. Hi Vija,

      So sorry for your loss.

      Almost a year passed since I lost Sarman and it still hurts. I really know how do you feel. I can’t say much, I hope he can hold on to life. Whatever happens, thank you for taking care of him. They all deserve the best. I am sure he knows how much do you love him.

  4. You wrote a beautiful story about a horrible disease. My beloved Rosemary has just been diagnosed, and your story did give me some comfort. Most of all, I am so happy you gave Sarman a home, good food, and so much love. One of my favorite things about Istanbul is the cats, and how people take care of them; thank you.

    1. Really sorry to hear that… I hope she lives as long as possible and as comfortable as possible. Thank you for caring for her.

  5. Tomorrow we will be putting our 7 month old coon cat sofie down because of this nasty disease she is my first cat and we are all heart broken my granddaughter is so upset she was so Beautiful until the sickness set in

  6. We lost our little guy Buster yesterday, 5 and a half months old. Only 5 days passed from diagnosis until I found him gone after work on the 14th. We’re all heartbroken, but none worse than my 10 year old, he was hers, and she was his.

  7. I’m so sorry to hear about Sarman. Mine and my fiance’s sweet cat nambed Furbelle suffered the same fate. She was a small cat that only weighed 5lbs at two years of age. If me or my fiance(Michael) ever had to go to the store or anything she works get so upset. She would set in her window seat and wait for us to come up in the front of the apartment and then she won’t start meowing. Furbelle would wait patiently for us to put our things down so we could have our special furbelle lovings. In November of 2017 my fiance was diagnosed with cancer and passed away six months later in May 2018. Sweet little Furbelle mourned his passing and it was so heartbreaking to watch her mourn and to know I couldn’t make it better for her. Then unfortunately sweet Furbelle was diagnosed with FIP and passed away. Furbelle passed away 3 months to the day of my fiance(Michael’s) passing. My sweet little baby Furbelle was only two yrs. old but in that two years she gave me more love than I could have ever imagined and just as much happiness. I hope and pray for the day to come that a cure will be found for this terrible disease.

    1. Very sad stories. I am so sorry… I think Furbelle got so upset after your fiance, which may have contributed to her illness. Really, really sorry…

  8. I’m so sorry to read your story. My little Victor was just diagnosed today. He is still eating but very thin and his abdomen is very distended. It is so heartbreaking. He is only 8 months old.

  9. Thank you for writing about Sarman. It is really helpful information. Heartbreaking but helps to read about your little kitty. My Victor literally fell off my roof along with another kitten into my life. Logan, the other kitten is thriving. They were born on our roof from a stray mama. I guess we should consider ourselves lucky for the time we have with these little guys.

  10. My cat has had a fever now for almost two weeks…no antibiotic will bring it down. A total sign of FIP. He tested positive for it. My Dr. And I feel his age doesn’t fit the criteria as he is 7 but has all the symptoms. He had an x-ray done…no fluid visible so it very well might be the dry form. He is such a lover.. In good spirits…totally alert and wants to be normal. He has been hospitalized for the last week. Appetite not as good…lethargic…mild diarrhea… And that fever just won’t break…104.4 to 105 range. My heart breaks. I cry daily. He wants to be normal and tries but this fever won’t let go. I have so much money invested into him. If he didn’t show the will to live I would have put him down as per the suggestion of my last vet…but his will keeps me hopeful. I have spent almost 1 hour out of my day….generally my lunch hour at the vets to be alone with him. Feed him…groom him…pet him…talk to him…just to let him know I’m there for him.

    1. So sorry… I know how do you feel. I am sure he understands how do you love him and he appreciates what you’ve done for him. I hope a miracle happens and he clings to life.

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