Hi,
I think that unless you are selling a cat to a multi-cat household or to another cattery, then the likelihood is that the kitten had the coronavirus infection firstly in the breeder's home and the mutation then happened between 6-24 months ->FIP.
Catteries/breeders are far more likely to have coronavirus infection than a normal household. I still don't think though that you can place the blame solely on breeders. I think the blame partially is in the cat itself in that it has an abnormal reaction to the coronavirus leading to FIP. The blame is also on the fact that coronavirus is such a common infection, 80-90% in catteries and 30-40% in the general cat population. How can you have a completely negative environment when you could quite easily bring it home on the soles of your shoes? The incidence of FIP is not really high enough for us to have our cats in a intensive clinical environment, and would that be good for our cats anyway, gloves and masks etc....
The database would only contain cats/kittens that had FIP, we can all make our own conclusions re lines. One kitten with FIP in a line may not be very significant but if you could see a few then there may indeed be a problem.
The breeders who are knowingly breeding from cats with FIP kittens or sickly kittens/cats are negligent in my mind anyway so they do not actually deserve to be selling kittens. They are in fact escalating the problem.
I know it would probably unworkable unless it was an offense eg via the GCCF or TICA to not enter an FIP kitten in the database.
In a perfect world............
Elsa