Pythons can get IBD too, and it kills pythons much more quickly than it kills boas.
If you search IBD on the forums you will find many threads. Google has a lot of information too, I would search both "IBD" and "Inclusion Body Disease."
Here is the very first link.
http://www.boa-constrictors.com/en/I...n_Body_Disease
Also I don't do shows very often and he's we quarantine after getting back from shows. Not willing to risk it! Not just IBD, but crypto, mites, etc. some have said that 90 days isn't long enough of a quarantine to rule out these diseases, and maybe it's not. But it's better than NO quarantine. There is an alarming amount of people who ignore quarantine completely.
There's really only a handful of people I buy snakes from now though and we generally get more than one snake at a time, so with them being from the same vendor they are usually quarantined together.