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rec.pets.cats: Feline Infectious Peritonitis FAQ

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Archive-name: cats-faq/FIP
Last-modified: 13 Aug 1999

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                     Feline Infectious Peritonitis FAQ
     * Disclaimers
     * Summary
     * General Information about FIP
     * Multi-Cat Household/Cattery Management
     * References
   The main author of this FAQ is Erin Miller [].
   However, this FAQ could never have been written without the
   information, editing, re-writing and general encouragement of Norman
   Auspitz [L13264%M9RSCS.GESNINET@GE1VM.SCHDY.GE.COM]. Also thanks to
   Lorraine Shelton
   [] for her
   advice and references.
   The purpose of this FAQ is to answer frequently asked questions about
   Feline Infectious Peritonitis (FIP), which is one of the most
   difficult diseases in the feline community today. This FAQ is divided
   into two parts, the first is general information about the disease,
   and the second is about management of FIP in a multi-cat and cattery
   environment. The sources for this FAQ are listed at the end, as well
   as some additional recommended readings. Recently an excellent source
   of information on FIP has become available on the WWW as well. This
   article is much more technical and many cat owners may find it much
   more dense than this FAQ. However, if you are interested it cat be
   found at: There is also some
   information about FIP put out by Cornell at:
   I want to point out first and foremost that I am not a veterinarian,
   nor even a person who has training in animal science such as a
   veterinary technician. I am a graduate student of physical
   anthropology, and an ailurophile. My goal with these FAQs is to take
   information from the medical literature and convey the parts that are
   most useful to the average cat owner and translate them into general
   terms that are easy to understand. I attempted to keep the FAQ as
   untechnical as possible, but unfortunately with such a complex disease
   that becomes very difficult. I hope this prooves to be of some
   usefulness. Also keep in mind that this disease is one of the most
   controversial subjects in feline health care. This is not a definitive
   guide to FIP, but only an attempt to compile the most current
   information. Ideally the reader of this FAQ should use this as a
   starting point when discussing FIP with their veterinarian. Vets and
   breeders will hold a wide variety of opinions on this disease, some of
   which may be based on current information, some of which may be based
   on hearsay and anecdotal evidence. You can only do your best to become
   as educated as possible and make your decisions on the course of
   treatment or preventive care. Always remember, your cats is YOUR
   responsibility, and no one, not your vet, not a breeder, not a
   friend-who-knows-everything-there-is-to-know-about-cats, nor the
   writer of an internet FAQ can force you do take an action that you
   don't feel comfortable with. Do what you think is best for your cat.
   To begin and unfortunately in sum: There is NO effective treatment,
   there is NO diagnostic test, there is NO way to positively identify
   asymptomatic carriers (cats which shed the virus, but do not
   themselves show outward signs of illness), the incubation time is
   UNKNOWN, NO one is 100% sure of how it is spread between cats, and
   there is NO proven effective way to control its spread in a multi-cat
   household or cattery. So what is known? Read on.
PART I: General Information about FIP

   I've heard FIP is like AIDS. Can I catch AIDS or anything else from
   People often use the "it's like AIDS" phrase to describe a number of
       illnesses in the animal (and human) community with the idea that
       most people know so much about AIDS that this analogy is useful.
       Unfortunately most people don't know much about AIDS and the
       resulting effect is to scare people out of their wits and have
       them dump their cats or dogs at the nearest pound because they are
       so deathly afraid of catching AIDS from them. The ONLY similarity
       between FIP, FIV (Feline Immunodeficiency Virus) and FeLV (Feline
       Leukemia Virus) to HIV (which is believed to cause AIDS) is in
       their genetic makeup. All are RNA (as opposed to DNA) viruses, and
       FeLV and FIV (and HIV) are what are known as "retroviruses." FIP
       is a type of "coronavirus" which makes it even less similar to
       See the FeLV FAQ for more information on retroviruses.
   So what *is* FIP?
   FIP is not caused by a retrovirus but by a type of coronavirus. One of
       the reasons FIP is such a problem for vets is because there may be
       no way to differentiate an FIP virus from certain other viruses.
       Current thinking is that FIP is caused by a mutation of the Feline
       Enteric Coronavirus (FECV). FECV is very common, and an FECV
       infection can have symptoms ranging from none, to flu-like with or
       without diarrhea. These are most common in kittens, but can occur
       in cats of any age. If the immune system is not functioning
       properly, a mutant FECV can become a more systemic infection that
       we call FIP. All FIP tests appear to react the same way to every
       type of coronavirus. So, if your cat had FECV as a kitten, it may
       cause the same reaction in the current test as true FIP (more on
       the tests below).
       For the purpose of this FAQ, however, I am going to continue
       referring to an "FIP Virus" or "FIPV." Just keep in mind that in
       fact, there may not be a difference between FIPV and FECV per se,
       just a difference in the way a cat's immune system responds.
   What are the symptoms of FIP?
   FIP usually appears in one of two forms: Effusive (wet) and
       Non-Effusive (dry). It should not be thought, however, that there
       are two different FIP diseases. The results of the infection are a
       continuum on a scale, with the 'wet version' being one end, the
       'dry version' being in the middle, and a 'carrier' being the other
       end (a carrier is where the cat has successfully fought off the
       disease but may still be able to expose other cats to the virus).
       The way this happens is when a cat is exposed to FIPV, if its
       immune system gives a poor response, the wet form will develop. If
       it gives a better response, the dry form will develop. In the best
       responses, the cat will not develop either form of FIP, although
       it may be a carrier of the FIP virus.
       The wet form is more common, and more rapid in progression than
       the dry form. It is characterized by the abdomen and/or chest
       progressively but painlessly distending with fluid. If this occurs
       in the chest, respiratory distress can occur due to compression of
       the lungs and release of fluid into the airways. The lining of the
       affected cavity will be covered with white, fibrin-containing
       areas (fibrin is a protein that is the center of a blood clot),
       often on the liver and spleen. Certain types of lymph nodes may be
       enlarged. Other signs include jaundice; mild anemia; and
       gastrointestinal, ocular (e.g. eye ulcers or severe
       conjunctivitis), and neurological signs may also occur.
       The dry form is more rare (but appears to be becoming more
       common), and more slow in progression, often making diagnosis
       difficult. There is minimal fluid build-up, although weight loss,
       depression, anemia, and fever are almost always present. Signs of
       kidney failure, liver failure, pancreatic disease, neurologic
       disease or ocular disease may be seen in various combinations.
       Often the organs in question develop a characteristic
       pyogranulomatous inflammation (this is a chronic inflammation
       resulting in a thickening of the tissue and local accumulation of
       white blood cells). Unfortunately biopsy of these lesions is the
       only definitive way to diagnose this form of FIP and is usually
       done in the form of a post-mortem diagnosis.
   What are the differences between FIP and FECV?
   FIP is a disease. Normally the disease/virus relationship is simple,
       but this is not the case with FIP. FIP may be caused by many
       things, perhaps an isolated FIP virus (FIPV), perhaps a mutation
       of FECV, or perhaps there are multiples viruses which can all lead
       the the same disease complex known as FIP. There is little
       question, however, that the most common cause of FIP is via FECV.
       For the most part, FECV is limited largely to the intestines and
       is dealt with quite well by the cat's immune system. However, as
       recent studies seem to indicate, FECV can mutate into FIP and, if
       the cat's immune system is not operating properly, this mutant
       FECV stops being just an infection of the intestine and becomes
       the more systemic infection we call FIP.
       Thus, wherever you have FECV you could have FIP! Some cats never
       get FIP, but can continue to shed the FECV virus (now thought to
       be spread via the feces). The good news, however, is that since it
       seems that the dry form is becoming more prevalent, that cats are
       gradually becoming more able to resist FIP infection in general.
   Is my cat at high risk?
   If it comes in regular contact with other cats (i.e.: an
       indoor/outdoor cat), the answer is YES! The lowest risk groups are
       indoor only, single-cat households. The higher the number of cats,
       the more risk of FIP. The higher the number of cats, the higher
       the titer test results (more on titers below). Single-cat
       households are generally free of all coronaviruses. FIP occurs in
       greatest incidence in cats between six months and two years old,
       although infections are high up to five years old. Of course the
       most susceptible group to catching FIPV are kittens because under
       the age of 16 weeks their immune system is very bad in general.
       Studies also show that poor nutrition, high stress levels or poor
       husbandry increase the likelihood of getting FIP. Outside
       exposure, exchanging of animals, especially kittens and young
       cats, highly inbred cats, and cats in actively breeding households
       increase the risk. Males and females are equally affected.
   How is it transmitted?
   Wouldn't we all like to know! Seriously, there seems to be two schools
       of thought. One group (from Cornell-based publications and
       seminars) states that the spread is not known with certainty, but
       is believed to be by ingestion or inhalation of the virus. The
       other school of thought (from Dr. Pedersen and the UC, Davis based
       publications) believes that transmission is most prevalent when
       cats have close contact with other infected cats or their
       feces/urine. Both schools seem to feel that feces may play a large
       role in the method of transmission.
       Some studies suggest that viruses that can cause FIP can survive
       on dry surfaces (food/water bowls, litter boxes, human clothing,
       etc.) and can survive at room temperature probably up to 2 or 3
       weeks. If this is the case, then the two schools of thought on
       methods of transmission may not be so far apart, especially given
       that litter can contain dust to which small particles of feces can
       adhere. Thus the virus can possibly be spread via litter dust on
       shoes or clothing or etc. making it behave as if it were an
       airborne virus!
   If the virus can last so long on dry surfaces, what happens if I
   unknowingly come in contact with a cat with FIP? Can I give it to my
   Most household soaps, detergents and disinfecting agents will kill the
       virus. Make sure you wash any part thoroughly that has come in
       contact with the cat (don't forget your pants if the cat rubbed up
       against you). Bleach in a 1:32 solution is suggested for
       decontamination purposes.
   Is there a test?
   There is a test which will look for the presence of coronavirus
       antibodies in your cat's blood. If your cat has been exposed to a
       coronavirus, ANY coronavirus, its immune system will build up
       antibodies to it, and the titer tests for the level of those
       antibodies in the blood. But it does not distinguish between
       antibodies made specifically against FIP, or FECV, or any other
       coronavirus. A positive titer means only that your cat has created
       antibodies (therefore been exposed to) SOME form of coronavirus.
       The higher the titer, the more antibodies the cat has created.
       As if there were not enough problems with the coronavirus test,
       there is no uniformity between different labs. One cannot compare
       results from one lab to another. Some labs just specify positive
       or negative if the results are above or below a given titer (often
       these labs do not even specify the titer). There are no standards
       for setting up a lab, there is no regulatory body that oversees
       them, and no requirement for validation of test results. It is
       also possible for a cat which has received the vaccine (more
       below) to have enough antibodies to appear on the titer test. To
       top it all off, false positives occur in up to 30% of the tests.
       There are some clinical indicators which your vet may discuss with
       you if s/he suspects that a cat has FIP, particularly if it is
       showing likely symptoms. Some blood tests can help your vet
       pinpoint FIP as a cause for your cat's condition, this includes
       looking for a high amount of gamma globulin proteins and a low
       amount of albumin proteins in the blood.
       There has also been talk of a polymerase chain reaction (PCR)
       test, in the hopes that it can tell the difference between FIP and
       other coronaviruses. Significant scientific studies have yet to be
       concluded on this method. However, given that the most common way
       of a cat coming down with FIP is via the mutation of FECV, this
       test may have little or no value in the great majority of cases.
   What about the vaccine?
   There is a vaccine available, but it is controversial and some vets do
       not recommend it, although others highly encourage it. The
       manufacturer's tests state that it has an efficacy rate
       (protection rate in this case) of 69%. Cornell Feline Health
       Center then did a study which said the vaccine failed to show any
       protection, and that it accelerated the disease in 52.5% of
       exposed cats. However, this study used a different challenge virus
       strain and the route of administration was different than the
       manufacturer's tests. The 'real-life' significance of this has not
       yet been determined, neither Cornell nor the manufacture has
       received reports from the field of abnormally high numbers of cats
       which get the disease as a result of the vaccine. However, this
       study has caused a lot of people to swear-off the vaccine.
       It really is between an individual cat owner and their vet to
       determine the whether or not to vaccinate based on the best
       information available at the time.
   So are these the only test results?
   Well, Cornell concluded from the above that vaccine efficacy in a
       laboratory setting is highly dependent on the challenge. It offers
       protection at low challenge doses, none at higher doses. The
       problem is, no one knows what the "real world" dose level is.
       Another problem is that there are actually two strains of FIPV.
       Just as there are many different flu strains or cold strains which
       cause you to get sick several different times with the flu or a
       cold, because each time you catch a different strain for which you
       aren't already immune. Type I strain of FIP is believed to be the
       most prevalent in the "real world" but it is the most difficult to
       reproduce in a laboratory. Type II is easier to reproduce, but not
       as prevalent outside. It is not known how effective a vaccine
       against one type will be against the other type.
       So, while some of the studies have found the current vaccine
       effective against the Type II strain of FIP, there is no evidence
       either way as to if it will work against the Type I strain.
   So that is Cornell's opinion, are there any other points of view?
   The consensus arrived at the seminar sponsored by the Winn Foundation
       on FIP/FECV is that the enhanced disease effect is a laboratory
       phenomenon, especially since that study by Cornell only used
       seropositive cats in the first place.
   What is a seropositive cat?
   Some cats test positive on the coronavirus titer test, some do not.
       Those which have never been exposed to ANY form of coronavirus are
       called "seronegative." Those which have been exposed to some form
       of coronavirus are called "seropositive." The Winn
       Foundation-sponsored research felt the Cornell study was flawed
       because it used cats which had already been exposed to some form
       of coronavirus (were "seropositive") and then attempted to test
       the vaccine.
       This is not to be confused with the terms "FIP negative" and "FIP
       positive" which are used by many labs to indicate that the
       coronavirus titer is less than (negative) or more than (positive)
       some predefined threshold level.
   Have there been any more recent studies?
   Yes. In another, recent study cats were tested in the same manner as
       in the vaccine manufacturer's tests. At the end of an 8-week
       period, 30% of cats vaccinated, and 60% of the controls
       demonstrated FIP-positive conditions from tissue examinations.
       This demonstrates a 50% "preventable percentage."
       Another recent field trial ran for 16 months using 500 cats in a
       no-kill shelter with endemic FIP. The fact that this is a shelter
       makes it a different makeup than a cattery (and some multi-cat
       households) because the average age of a cat was approximately 2
       years old, and there were no kittens under 16 weeks old. However
       ALL cats tested were seronegative prior to exposure in the
       shelter. During the time of the study, 0.8% of the vaccinated cats
       died and 3.25% of controls died of FIP. [This is statistically
       significant at p=.048, which means that there is a 95.2%
       probability that this result is not random] So, for seronegative
       cats over the age of 16 weeks, this study shows a 75% efficacy
       rate. Vaccination after exposure (after a cat is already
       seropositive) is not likely to be helpful in preventing the
   So what does this all mean?
   In sum, if you know your cats are seronegative, and they are older
       than 16 weeks, the vaccine is recommended by both the Cornell
       Feline Health Center and the consensus reached at the Winn
       Foundation sponsored FIP/FECV seminar. If your cat is already
       seropositive, there is not much evidence that the vaccine will
       The vaccine will be more of a help when
     * the manufacturers demonstrate its effectiveness against the Type I
       strain of FIP
     * it is shown to be effective in seropositive cats, and
     * it could be shown to be safe and effective for kittens under the
       age of 16 weeks.
   However, it appears that there is work being done to develop a FECV
   vaccine. Preventing FECV infections in the first place, and thus
   preventing FECV from mutating into FIP, might turn out to be another
   technique in trying to protect against FIP.
   My vet believes that my cat has FIP, what is the best thing to do?
   Usually by the time the vet is able to pinpoint FIP as the cause of
       your cat's condition, the cat is pretty far along. So long as your
       cat is in pretty good shape, not in any pain or discomfort, there
       is no reason to euthanize it. Even if your cat is happy and
       healthy, however, you MUST make sure you keep it indoors and away
       from other cats. If you feel that this will be too great a
       compromise on its quality of life, it is better to euthanize it.
       Since the cause of transmission is not known, by allowing your
       FIP+ cat outside, you could cause numerous other cats to become
       ill, and even further spread the disease. But please keep your
       cat's welfare foremost in your mind. When its systems begin to
       fail, when it is in obvious discomfort, you are only making things
       worse by delaying the inevitable. Keep him or her as happy and as
       comfortable for as long as possible, that is unfortunately the
       only solution at this point.
PART II: Multi-Cat Household/Cattery Management

   I have a lot of cats, what can I do to keep the risk of FIP down?
   Limit the number of new cats and isolate each for at least one month,
       preferably two. I know it sounds like a long period of time, but
       consider the alternatives! You could lose every cat in your
       household. During the one month's time period, make sure you watch
       carefully for signs of illness. You should give the coronavirus
       titer test at the beginning and the end of the quarantine period,
       and the titer should decrease over that time period.
       Scoop the litter box daily, discard the rest of the litter weekly
       and disinfect the boxes with a 1:32 solution of bleach. The area
       around the boxes should be swept and disinfected, there should be
       at least one box for every two cats in the household. Again,
       weekly discarding of the scoopable litter may seem like a waste,
       but so far the ONLY thing the sources agree upon with regard to
       transmission is that it is definitely transmitted through the
       feces, if nothing else. In the words of one breeder: "It cost me
       approximately $3,000 in veterinary and laboratory services to
       diagnose the incidence of FIP in my cattery, test and retest (and
       retest) all of my cats. Believe me it is FAR less expensive to
       discard the litter" (Polli, p. 81). If your cats have long hair
       and fecal matter tends to stick to the britches, this hair should
       be kept clipped short.
       Change food and water daily, disinfect the bowls weekly. Do not
       mix the bowls all around the house, keep the same set of bowls
       with the same cats, and keep the same set of litter boxes with the
       same cats.
   What if one of my cats if pregnant?
   It is suggested that queens be completely isolated from other cats
       (isolated in its own room, not its own cage within a room). This
       room should be empty for one week prior to placing the queen
       there, and should be disinfected with a 1:32 solution of bleach.
       The queen should be placed in the isolation room 10-14 days prior
       to delivery. All bowls and litter boxes should be used exclusively
       for that room, and not interchanged with any others. You should
       disinfect your hands when entering and leaving the isolation room.
       If possible, you should even try to have separate clothing, such
       as a smock and slippers which are restricted to the isolation room
       to decrease risk.
       If the queen is not seronegative, you may want to consider an
       early weaning program. The queen should be removed from the
       kittens at age 4-6 weeks and never returned. During the first 4-6
       weeks of a kitten's life, it gets its antibodies from their
       mother, therefore they are immune to anything she may be shedding.
       After that time period, they start making their own antibodies. If
       the queen is a carrier of coronaviruses, she can shed FECV to the
       kittens, and they are most likely to become infected during that
       time period. Regardless of whether the kittens are weaned early
       and isolated from the mother, they should be kept isolated from
       all other cats in the household. In addition to minimizing the
       risk of the kittens developing FIP, the risk of exposure to other
       viruses and diseases will be reduced.
       Kittens should be raised in complete isolation from the queen and
       all other cats/kittens in the household until they leave the
       cattery. If the kitten is to be kept in the cattery, it should be
       isolated for 16 weeks, and then the FIP vaccination series should
       be completed before allowing the kittens to interact with the
       other cats.
   Is there any evidence for this?
   A 1992 study found the following: 400 kittens were divided into 41
       household with various FIP histories. In one group the kittens
       were allowed to freely associate with all the cats. In a second
       group the kittens were isolated only with their mother. In the
       third group, the kittens were isolated by themselves starting at
       age 2-6 weeks. Only in this last group did all of the kittens
       remain seronegative for any/all coronaviruses.
   That sounds absolutely ridiculous! Who would go through all that?
   Nobody says a breeder HAS to do any of this. These are merely the
       precautions currently recommended by the Cornell Feline Health
       Center and the recommendations which came out of the Winn
       Foundation sponsored Seminar on FIP/FECV. It is an option kitten
       buyers can use in determining which breeder to select if they so
       choose, but it is by no mean mandatory.

     * Polli, Leigh. "Highlights from The Winn Feline Foundation
       International FIP/FECV Workshop." Cat Fanciers Almanac, 11(8),
       December 1994.
     * Richards, James R. DVM. "Management of Coronavirus Infections in
       Catteries and Multicat Households." Comprehensive Seminar for Cat
       Breeders Cornell University School of Continuing Education and
       Summer Sessions.
     * Siegal, Mordecai (ed.) Cornell Book of Cats: Comprehensive Medical
       Reference for Every Cat and Kitten. New York: Villard Books, 1991.
  Additional Readings:
     * Addie, D.D. and Jarret, O. "A Study of Naturally Occuring Feline
       Coronavirus Infections in Kittens." Vet Record Feb. 15, 1992.
     * Barlough, J. E. and Stoddart, C.A. "Feline Infections
       Peritonitis." Cornell Feline Health Center Information Bulletin 6,
     * Olsen, C, and Scott, F.W. "Feline Peritonitis Vaccination - Past
       and Present." Feline Health Record Topics for Veterinarians 6(20),
       Spring 1991.
     * Scott, F.W., Corapi, W.V., and Olsen, C.W. "Evaluation of the
       Safety and Efficacy of Primucell FIP Vaccine." Perspectives on
       Cats, Fall 1992
     * Richards, J.R. "FIP: The Challenge Continues." Cat Fancy 36(5):
       May 1993.
       Papers in Feline Practice Volume 23, Number 3. May/June 1995
     * Addie D.D., Jarett O. Control of Feline Coronavirus Infections in
       Breeding Catteries by Serotesting, Isolation, and Early Weaning.
       Feline Practice 23(3), 92-95, 1995.
     * Addie D.D., Toth S., Murray G.D., Jarett O. The Risk of Typical
       and Antibody Ehhanced Feline Infectious Peritonitis Among Cats
       From Feline Coronavirus Endemic Households. Feline Practice 23(3),
       24-26, 1995.
     * Fehr D., Holznagel L., Bolla S., Lutz H., Hauser B., Herrewegh
       A.A.P.M., Horzinek M.C. Evaluation of the Safety and Efficacy of a
       Modified Live FIPV Vaccine Under Field Conditions. Feline Practice
       23(3), 83-88, 1995.
     * Gerber J.D. Overview of the Development of a Modified Live
       Temperature- Sensitive FIP Virus Vaccine. Feline Practice 23(3),
       62-66, 1995.
     * Herrewegh A.A.P.M., Egberink H.F., Horzinek M.C., Rottier P.J.M.,
       de Groot R.J. Polymerase Chain Reaction (PCR) for the Diagnosis of
       Naturally Occurring Feline Coronavirus Infections. Feline Practice
       23(3), 56-60, 1995.
     * Hickman A., Morris J.G., Rogers Q.R., Pedersen N.C. Eliniation of
       Feline Coronavirus Infection From a Large Experimental Specific
       Pathogen-Free Cat Breeding Colony by Serologic Testing and
       Isolation. Feline Practice 23(3), 96-102, 1995.
     * Horzinek M.C., Herrewegh A., de Groot R.J. Persepectives on Feline
       Coronavirus Evolution. Feline Practice 23(3), 34-39, 1995.
     * Hoskins J.D., Taylor H.W., Lomax T.L. Independent Evaluation of a
       Modified Live Feline Infectious Peritonitis Vaccine Under
       Experimental Conditions (Louisiana Experience). Feline Practice
       23(3), 72-73, 1995.
     * Hoskins J.D., Henk W.G., Storz J., Kearney M.T. The Potential Use
       of a Modified Live FIPV Vaccine to Prevent Experimental FECV
       Infection. Feline Practice 23(3), 89-90, 1995.
     * Kass P.H., Dent T. The Epidemiology of Feline Infectious
       Peritonitis in Catteries. Feline Practice 23(3), 27-32, 1995.
     * McArdle F., Tennant B., Bennett M., Kelly D.F., Gaskell C.J.,
       Gaskell R.M. Independent Evaluation of a Modified Live FIPV
       Vaccine Under Experimental Conditions (University of Liverpool
       Experience) Feline Practice 23(3), 67-71, 1995.
     * Pedersen N.C. An Overview of Feline Enteric Coronavirus and
       Infectious Peritonitis Virus Infections. Feline Practice 23(3),
       7-20, 1995.
     * Pedersen N.C. The History and Interpretation of Feline Coronavirus
       Serology. Feline Practice 23(3), 46-51, 1995.
     * Pedersen N.C., Addie D., Wolf A. Recommendations From Working
       Groups of the International Feline Enteric Coronavirus and Feline
       Infectious Peritonitis Workshop. Feline Practice 23(3), 108-111,
     * Postorino Reeves N. Vaccination Against Naturally Occurring FIP in
       a Single Large Cat Shelter. Feline Practice 23(3), 81-82, 1995.
     * Richards J.R. Problems in the Interpretation of Feline Coronavirus
       Serology (Specificity vs. Sensitivity of Test Procedures). Feline
       Practice 23(3), 52-55, 1995.
     * Scott F.W., Corapi W.V., Olsen C.W. Independent Evaluation of a
       Modified Live FIPV Vaccine Under Experimental Conditions (Cornell
       Experience). Feline Practice 23(3), 74-76, 1995.
     * Scott F.W., Olsen C.W., Corapi W.V. Antibody-Dependent Enhancement
       of Feline Infectious Peritonitis Virus Infection. Feline Practice
       23(3), 77-80, 1995.
     * Vennema H., Poland A., Hawkins K.F., Pedersen N.C. A Comparison of
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   All rights reserved, please ask about redistribution.

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