I was referring to the lethality of IBD in pythons, specifically balls, which I understood as (essentially) being 100%.

I hadn't done much research into IBD in boas because I'm not a boa keeper. It may stay that way as I have no desire to endanger my python collection as I have no way to keep the animals in seperate rooms.

It may be a stretch, but could IBD in boas be compared to herpes in behavior?