Understanding feline infectious peritonitis

What is FIP?

Feline infectious peritonitis is a systemic inflammatory disease associated with feline coronavirus. Exposure to feline coronavirus is common, while only a minority of infected cats develop FIP.

Possible signs

Signs vary and are not specific to FIP, which is why diagnosis cannot be made from an online checklist.

• Persistent fever or lethargy
• Reduced appetite and weight loss
• Abdominal or chest fluid
• Breathing difficulty
• Eye changes
• Poor coordination, tremors or seizures

How veterinarians investigate FIP

Veterinarians combine history and examination with blood tests, imaging and analysis of fluid or tissue samples when indicated. The approach depends on the cat’s presentation and available evidence.

Treatment and support

Antiviral treatment has substantially changed the outlook described in current veterinary literature. A licensed veterinarian should select and monitor any treatment and address hydration, nutrition, discomfort and concurrent disease as needed.

Seek urgent help

A cat with breathing difficulty, collapse, seizures, severe weakness or inability to eat or drink needs urgent veterinary care. Do not delay assessment while waiting for an online order or response.