FIP is a mutation of the coronavirus for cats. Many cats carry this virus, but only in a small proportion does it really mutate into FIP.
There are different types of FIP. Namely:
- Wet FIP. In this process, the cat develops fluid in his or her abdomen and/or the chest
- Dry FIP. This causes the cat to develop inflammation in his or her body. The inflammations can originate in various organs
- Ocular FIP. This is avariant of dry FIP in which the eyes are affected and there is an inflammation in the eye
- Neurological FIP. This is also a variant of dry FIP in which the cat has inflammation in the nervous system
The diagnosis of FIP is often difficult to make. With wet FIP, the swollen abdomen is often visible and therefore a lot easier to diagnose. Dry FIP, on the other hand, is a lot more difficult.
When a cat is already a carrier of the virus, FIP can often mutate after a stressful situation. In Nacho's case, the castration.
FIP mainly occurs in young cats up to 2 years of age or in older cats. It is said that pedigree cats are more likely to develop FIP, but this has not been scientifically proven. In principle, any cat could get FIP.