Feline infectious peritonitis Virus (FIPV),also called FIP is a viral disease that occurs worldwide in cats. It is caused by a type of virus called a coronavirus, which tends to attack the cells of the intestinal wall.

Wet FIP
Cats under 2 years old are highly suspected of having feline infectious peritonitis when ascites or pleural effusion was found in their body.

Dry FIP
Dry FIP usually has a long subclinical period and needs observed combining with its clinical signs. Symptoms include periodic fever, lethargy, loss of appetite and weight loss, growth retardation, dry hair and that were not responsive to antibiotic therapy. And blood biochemistry contributes to the diagnosis of FIP, FCoV titer≥1:3200 can be reasonably inferred to be FIP.

Dry to Wet
The two forms of FIP are somewhat interchangeable, when it has been observed in experimental infection, the dry form always follows a brief bout of effusive disease. In the terminal stages of naturally occurring dry FIP, immunity can completely collapse and the disease reverts to a more effusive form.