@bkcunningham
All tests for feline aids/leukemia/toxoplasmosis were negative. 2 sets of Xrays showed no tumors, bowel obstructions or fluid build up, but…that can come later in the case of the dry form. He has not responded to the antibiotics if he had a mysterious bacterial infection he should have shown marked improvement by now. Yes, the vet is 99.9 % sure this is the case.
It is possible he was exposed as a kitten,or, my other cat is a carrier but asymptomatic. Impossible to tell, but she is not at risk most likely as she would have been exposed already and has shown no symptoms. It is possible she could become symptomatic, but the odds are quite small,
It can be a concern in multiple cat households, with less than quality litter box maintenance ,but, in the one or two cat household ( mine ) the odds are 1 in 5000.
All cats are exposed, and usually it is a mild intestinal virus that passes undetected. In 5–10% of cats with immune deficiencies ( the very young due to their immature immune systems, and the elderly, it can mutate into the terminal disease of FIP)
Most cats do not develop the mutated version of the Corona virus that morphs into full blown FIP.
It can also be passed perhaps through the placenta to the fetal kittens, and, may or may not mutate months or even years down the road.
The highest risk groups are kittens up to about 18 months old and the compremised elderly.
‘They’ think that stress can play a factor as it can in human as well.
Marley changed homes twice in his first 7 months, underwent vaccinations and neutering and then was lost for 4 days. 3 significant stressors in a short period of time, but…again, it is simply a matter of how the animals immune system responds. Plenty of cats expereince similar stressors without any effect.
It also mutates in a very individualized manner in each cat, so no ‘one size’ fits all.
At this stage Marley is not contagious as the virus is embedded deep in his system and there is no more shedding via fecal contamination.
I am hopeful Mia will not fall ill, if we make it a few more months I think it is safe enough to assume she will not become ill.
It is rare in cats over 3 of age until they reach their senior years again.
The test that shows exposure to the Corona virus cannot predict FIP outbreaks, only to show the cat has been exposed.
Just like us. Most of us have been exposed to the herpes viruses, but not everyone will break out in cold sores when sick or stressed.
It’s just one of those unpreventable things all in all. :-(