Feline Infectious Peritonitis (FIP) is an unusual, but often fatal, consequence of coronavirus infection of the cat and ferret. The majority of cats and ferrets infected with coronaviruses lead perfectly normal lives. However, if you are thinking of buying a pedigree (purebred) kitten - INSIST that he or she is feline coronavirus (FCoV) free - otherwise you may be buying heartache. A paper published in Feb 2012, shows how such quarantine and testing has kept the Falkland (Malvinas) Islands free of FCoV and FIP.
Welcome to my website.
1. to provide accurate and up to date information about feline coronavirus (FCoV), the cause of feline infectious peritonitis (FIP) in cats.
2. to provide a register of FCoV tested studs and queens so that enlightened cat breeders who know their cats FCoV status can contact each other. In the 1970s, Abysinnian cat breeders began testing for FeLV and eliminated it from their breed, other cat clubs followed suite. Now, at least in the UK, it is extremely rare for a pedigree kitten to be sold with FeLV, thanks to the dedicated testing of cat breeders. In Scotland, most Birman breeders are FCoV free. The war against coronavirus and FIP has begun - I hope you will join it.
3. to provide up to date information about feline chronic gingivostomatitis
4. to provide a register of FCoV free kittens.
5. to provide a register of stud and queen cats of known blood type.
6. to raise urgently needed funds for FIP/FCoV research.
8. to provide lists of genetic/hereditary diseases and disease predispositions of breeds of cats
Breaking news: non-effusive FIP diagnosis just got easier - our paper Diagnosis of non-effusive feline infectious peritonitis by reverse transcriptase quantitative polymerase chain reaction from mesenteric lymph node fine needle aspirates has just been published online: https://journals.sagepub.com/doi/full/10.1177/1098612X18809165. We are hoping that our new test will save cats from being put through invasive biopsies in order to achieve a diagnosis of dry FIP. Read more about it in my most recent newsletter.
University of California, Davis, is seeking homes for some of their FIP recovered research cats: click here for more details (will open in new tab).
Feline coronavirus transmission video has now had over 100,000 views on YouTube Thank you to everybody who has given it the thumbs up and subscribed to my YouTube channel. Big thanks also to the catvirus subscribers who enable more educational videos to be made.
If you appreciate this website please become a supporter by sending a monthly or yearly donation.
Mission statement: I want to eradicate feline coronavirus (FCoV) and feline infectious peritonitis (FIP). The purpose of this website is to make FCoV/FIP information available to the veterinary profession and to help and guide distressed cat guardians when they receive a diagnosis of FIP.
After one year of Platinum subscription, or for 2000 euros / dollars / 1500 GBP paid up front (2 months free), you can have a dedication to your cat or yourself put onto one of my videos, with a photo. Provided your veterinary surgeon gives permission, you can also work with me to eliminate FCoV from your household (laboratory tests cost extra).
Ordinary subscribers will receive my newsletter, email notification of film uploads and new content on the website: choose your level of subscription up to 9 USD/Euros /GBP per month from the drop down menu.
Subscriptions give me an income; pay for website hosting and maintenance, and for expenses incurred in making videos (e.g. designers or animators). Once my target of 20 gold subscribers (or the equivalent) is achieved, all subsequent subscription money will be spent on research. If you prefer to make a research donation now, please visit the Angelica Memorial Page.
Veterinary subscribers MUST be veterinary professionals: post- or under-graduate veterinarians. Veterinary technicians (nurses) are also welcome, although some of the material may be too esoteric to be practical.
Veterinary gold subscribers
You will receive copies of my papers as and when they occur. You will be able to discuss feline virus cases with me by email or Skype and we can work together to eliminate FCoV from your client’s household if you wish. If such cases become works I will publish, you will be a co-author of the paper. You may become eligible for catvirus.com certification as a recognised FIP expert and your practice recommended on the catvirus website, provided you have diagnosed and treated several cases where FIP was suspected, or eliminated FCoV from a household. Your Skype time can alternatively be used for life coaching, if you prefer.
""Feline Infectious Peritonitis and Coronavirus" - an ebook written for cat guardians or purchase the physical version from Amazon.
This book is available as an e-book from this website - see above - or as a paperback or kindle in English or Spanish from Amazon:
The chapters are:
1. Everything you need to know when your cat has been diagnosed with FIP
........(This download will open up in a new page as a word document.)
2. Everything you need to know about treating a cat with FIP
...... Download a current FIP treatment sheet from the Downloads menu to take with you to your veterinary surgeon.
3. Preventing your other cats or kittens from developing FIP
4. Everything you need to know about getting another cat or kitten
5. Everything you need to know if your cat or kitten is diagnosed as having diarrhoea caused by FCoV
6. Everything you need to know if you work in a rescue shelter or boarding cattery
7. FCoV/FIP prevention in trap, neuter, return (TNR) programs
8. Everything you need to know if you keep a lot (over 6) pet cats, or have a cat sanctuary or colony
9. Everything you need to know if you are a cat breeder
10. What you can do to help fight FIP
11. Everything you need to know to find more information
As regular visitors to the site will know, one of my dreams is to eradicate FCoV, and therefore FIP, from the whole world! Some years ago, the veterinary surgeons on the Falklands Islands, suspecting that the cats who lived there were already FCoV free, instituted a policy where all cats being imported to the Islands had to test negative for antibodies to Feline Coronavirus, the virus which cases Feline Infectious Peritonitis (FIP). We published a paper (will open in a new window) in the Journal of Feline Medicine and Surgery (JFMS), the journal of the International Society of Feline Medicine, showing that this policy was effective.
On a smaller scale, you can keep the cats in your household FCoV free (and therefore FIP free) by testing new incoming cats and kittens for FCoV antibodies BEFORE bringing them into the house. Too often I hear sad tales of an existing pet developing FIP after the introduction of a cat or kitten from a high-risk source, such as a breeder or rescue shelter. There are good breeders out there producing FCoV-free kittens - be sure to demand a FCoV antibody test before purchase. If the test turns out to be positive, then one can test the faeces to determine whether the cat is actually shedding virus, and if so, wait 2-3 months and re-test if you're keen to have that particular cat (or rehome the cat to somebody with no other cats).
CPD for veterinary surgeons: recordings of Dr Diane D. Addie's webinars on FIP diagnosis, and on FCoV and the gastrointestinal tract are available at the Webinarvet
Recordings of my webinars on the diagnosis of effusive and non-effusive FIP and on feline coronavirus and the gastrointestinal tract are are available from the Webinarvet website. These webinars are part of a series: watch this space for news of the next one. I also did one on FeLV and FIV diagnosis.
When I began this website, FIP was incurable. Now, Professor Niels Pedersen, of the University of California, Davis, has given us an anti-viral which has caused remission in 24 of 31 cats, as reported in his paper published February 2019. The anti-viral, GS-441524, is not yet easily available or affordable. However, feline interferon omega (Virbagen Omega by Virbac) has cured some cases and given others a period of remission. For non-effusive FIP, many cats are given Polyprenyl Immunostimulant from Sass & Sass. Unfortunately, Polyprenyl Immunostimulant does not work on effusive (wet) FIP cases.
My dream is for no cat ever to contract FIP in the first place, never mind die of it.
For more on FIP treatment - visit my FIP treatment webpage. If you would like to donate to FIP research, you can do so on this website.
I am happy to announce that my You Tube channel dealing primarily with Feline Infectious Peritonitis and Feline Chronic Gingivostomatitis, has already been viewed over 200,000 times. However, since YouTube was taken over by Google, it has deteriorated dramatically in quality and it no longer respects free speech, but has become a propaganda machine like the dinosaur media it once replaced. Therefore I now upload my videos first to D Tube and Bitchute, who seem to respect the values of human freedom. Below are the links to my channels (they will open in new tabs).
I am deeply grateful to talented French veterinary animator Dr Francois Bagaini of Vetocyte.fr for bringing some of my ideas to life by his animations. These videos form a key part of my dream to eradicate FCoV and therefore FIP - once people learn how to prevent their cats catching the infection, then FIP will simply no longer occur. Please share the videos and press the thumbs up "like" button if you would like to help eradicate FIP ,
Our most recent video shows how people can prevent FCoV gaining entry into their household of cats by testing newcomer cats (or kittens) for FCoV antibodies:
Here is our cartoon indicating how FCoV is transmitted, this video has already had over 60,000 views of the English version:
Please press the thumbs up "like" button to support our videos and share them.
(This section is written for veterinarians.)
It has been known for a while that ferrets had a unique coronavirus of their own (ferret enteric coronavirus, FECV) which causes epizootic catarrhal enteritis [3,4]. They also suffer from a disease which looks very much like infectious peritonitis of cats [1,2] and I am most grateful to Dr Jerry Murray, a ferret expert in Dallas, Texas, for bringing this to my attention.
Reported clinical signs include anorexia, weight loss, diarrhoea, large palpable abdominal masses. Effusions have not been described. Antibody against feline infectious peritonitis virus can be used in immunohistochemistry to confirm diagnosis.
At present moment, treatment is similar to that of FIP in cats - prednisolone. It is unknown whether interferon would help these ferrets or whether Primucell vaccination (Pfizer) would be effective in preventing it, though there is no reason to suppose it would not be protective (however, it would be used off-licence).
1. Juan-Salles C, Teifke JP, Morera N, Jiminez J, Montesinos A, Ardiaca M, Loehr CV, Garner MM. 2006 Pathology and immunohistochemistry of a disease resembling feline infectious peritonitis in ferrets (Mustela Putorius Furo). Vet Pathol 43:5 p845
3. Williams BH, Kiupel M, West KH, Raymond JT, Grant CK, Glickman LT. 2000 Coronavirus-associated epizootic catarrhal enteritis in ferrets. J Am Vet Med Assoc 217(4):526-30.
4. Wise AG, Kiupel M, Maes RK. 2006 Molecular characterization of a novel coronavirus associated with epizootic catarrhal enteritis (ECE) in ferrets. Virology. 349(1):164-74.
The event was organised by the wonderful Loretta Bartolucci and Italian veterinary surgeon Dr Francesca Serena, who gave an introductory lecture on stress and feline welfare. Francesca and Loretta can be seen below flanking the translator Nico, who did a really excellent job.
Madrid, Spain, 2010
This highly successful event sold out with over 150 delegates attending - I'm sorry if you tried to attend and were not able to. However, the proceedings are available (in English and Spanish, to veterinary surgeons only), though I believe you have to order a quantity of Purevax vaccine in order to get a free copy of the proceedings. Please contact Dr Daniel Rodes, of Merial, Spain - Daniel.RODES@Merial.com - to find out how to obtain a copy.
I was proud to be invited to contribute to the Fourth Edition of Prof. Craig Greene's legendary textbook "Infectious Diseases of the Dog and Cat." For me, this is the Bible of canine and feline infectious disease. It is available from Amazon. [Note - it is for veterinary surgeons only.]
The author: Dr Diane D Addie
Dr Diane D Addie is a veterinay surgeon and virologist who has spent the last 23 years researching feline infectious peritonitis (FIP) and feline coronavirus infection (FCoV). She qualified as a veterinary surgeon from the University of Glasgow, in Scotland, and spent 8 years in small animal practice in the north of England. She returned to Glasgow Veterinary School to research into FIP, her PhD was entitled "Studies on the humoral immune response to feline coronavirus." She is Honorary Senior Research Fellow at the University of Glasgow, Scotland, U.K and Director of the Feline Institute Pyrenees in France. Dr Addie serves on the European Advisory Board of Cat Disease.
Her dream is to eradicate FIP, at least from pedigree/purebred cats, and preferably also from rescue shelters, within the next 10 years. By becoming informed and spreading reliable knowledge, or by fundraising for research you can help her fight FIP.
She takes the stand that she prefers not to experiment on animals and all her studies have been on animals who have become infected or sick naturally and whose veterinary surgeons or guardians have contacted her.
In 2003 she received the Amoroso award for for outstanding contributions to small animal studies by a non-clinical member of university staff. She served on the council of Cats Protection for 20 years and is currently a patron of the Celia Hammond Animal Trust.
Declaration of lack of vested interests
The opinions and recommendations given on this website are completely independent - Dr Addie is not in on the payroll of any corporation, nor does she hold shares in any company mentioned on this site, nor is she on any board of directors of any corporation or company whose products are mentioned on this site, with the exception of the ebooks for sale on this site, where she receives up to 65% of the income, this being her main source of income. Dr Addie takes no income from donations made to the Angelica Trust.
She is a member of the European Advisory Board of Cat Disease whose meetings are funded by Merial, but whose veterinary members are volunteer and are unpaid. Merial simply pays the travel expenses and hotel.
Your use of this website at your own risk. This site is for information purposes only and is in no way intended to replace a consultation with a fully qualified veterinary surgeon (veterinarian). The information in this site cannot and should not be used as a basis for diagnosis or choice of treatment. Dr Addie excludes all liability whatsoever for any loss or damage arising out of use of this site or reliance upon its contents and strongly advises all users with veterinary related queries to consult a veterinary surgeon.
The answer to most of your FIP questions is here on the website and in my book "FIP and Coronavirus." If you do want a consultation with me, details of how to do so are below: please note thatI will HAVE to have your veterinary surgeon's consent before I can give you my opinion (RCVS rules).
Emails to my former address (draddie[at]btinternet.com) will no longer be received / replied to. Emails to my University of Glasgow email address will still be received, but there is a very long delay in getting them, thus a delay in responding.
For private, individual, consultation regarding your own pet, you must obtain the permission of your veterinary surgeon in writing for me to consult with you before you contact me (these are the rules of the Royal College of Veterinary Surgeons). Email: draddie [at] catvirus [dot] com.
* Because of the high input of my personal attention and time to the people in this group, this option is limited to only 10 people at any one time, so may not be available, but you can try it and see: if there is no vacancy you can take a one month option or get a refund.
Phone consultations are 200 Euros /GBP for one hour.
Dr Diane D. Addie is available for consultations for infectious disease control or diagnosis to veterinary hospitals, rescue shelters, boarding and breeding catteries and industry. She is also available to laboratories for consultation for the development of diagnostic tests.
The web designer: Melody Amundson
Melody Amundson made this site possible by generously offering her fantastic web designing skills free of charge as her generous donation to the cause of fighting Feline Infectious Peritonitis. She gave of her time and skills for over 8 years to keep this website working! You can see how artistic she is from the beauty of this website and the Orion Foundation website, and another example is her lovely colouring book for children, which you can purchase from her Devon Heaven website. Melody is a breeder of Devon Rex kittens and is active in the cat show world in the USA. She also forays into the world of cat rescue and any cat who crosses her path will benefit from the encounter!
The translator:Renata Fernandes
Renata Fernandes of rftranslations arranged translations of the site into other languages. Each language had 4 translators working on the website's text plus a proofreader at the end. Over 30 people from different parts of the world were willing to help get rid of coronavirus by using their translating skills and did so ENTIRELY VOLUNTARILY! This was an astonishing donation to help spread the word on FIP!
Renata has her own animal website AnimalSofties.com.
Unfortunately I am unable to answer all the queries that come to my inbox. I'm very sorry, but I'm sure you'll appreciate that every moment spent responding to queries is a moment less to devote to research. In addition, it would be unethical for me to advise another veterinary surgeon's client without their consent. Time permitting, if you donate to FIP research and provide written consent for me to respond to you from your veterinary surgeon, I will try to answer some queries. Go to the Angelica Memorial Page to make a donation.
Forums and chat groups provide support and answer queries for people with a cat suspected of having FIP or for those who are unfortunate enough to have lost a cat to FIP. The one I personally recommend is the FIP Advisory and Care group:
I also host a subscription only Facebook page called EndFIP which can be found on this address:
The site is continually being updated and new material added. I hope that you will find the answer to your questions here and that youll come back soon.
"The light shines in the darkness, and the darkness could not put it out."
you and your cats!
Last updated 18 February 2019
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2000-2018 Dr. Diane Addie