As Brigitte has mentioned, camphylobacter is found very commonly in the cat's gut and usually doesn't cause symptoms unless the kitten becomes stressed or immunocompromised. My understanding is that it is usually self limiting and doesn't require any treatment unless it is a very severe case.
Heads up though, in case your vet didn't mention it, this is a zoonotic organism, which means you can catch it from Rascal, so be sure to wash your hands after any contact with him and before eating any food.
Heads up though, in case your vet didn't mention it, this is a zoonotic organism, which means you can catch it from Rascal, so be sure to wash your hands after any contact with him and before eating any food.