Ok...first of all many of the viruses that we all seem to be freaked out about move more quickly in pythons than boas. Secondly if a python has IBD anyways the ONLY thing to do is put it down. There are no treatments, no cures, and very little preventative measures that can be taken. I would love the source you have for a virus that incubates for 10 months in snakes.
Thirdly while IBD does show an increased incidence rate in captive bred snakes versus wild caught ones...the overall prevalence rates of IBD are incredibly low. Getting your snake from a well know and reputable breeder is a large and positive measure one can take. Also a breeder who is honest about whether or not they have ever had any IBD cases....no being the operative answer to that question.