Not much is known about IBD, so that makes it even more dangerous. I believe false negatives can occur, especially in early stages. So if you're worried about it, it would be best to get a test when the snake arrives and at the end of it's quarantine. I think there is sometimes a chance of recovery if a snake has it but it often results in death. There are some people who have IBD positive collections so if you were to get a snake with IBD it would be ethical to give it to someone with an IBD positive collection. I don't think it's as infectious as everyone claims and if everything is thoroughly cleaned it's not likely to spread (but don't treat this as a fact). I'm pretty sure that UVC can kill the virus but reading about that is on my to-do list.