One of our Green Anacondas at the sanctuary where I volunteer at had IBD, or we thought it did. It was not doing well at all, and when I handled it, it would barely use any muscle, and when we got them in they did use their muscles a lot but were still stick. Though, while I was handling the sick Conda it started to turn its head and kind of spin around to make the body look kind of twisted. So, we thought it had IBD. We got these from the Texas seizure not too long ago, and we all made sure we washed our hands VERY well after handling this Conda.

The point of that story was to say that any boa can immediately show signs of IBD even if not too long ago it seemed perfectly fine. So, as the posts said above, you basically cannot guarantee you have an IBD free boa, but it can be possible to have a boa without IBD at all (not even carrying it). All I have to say is no matter what always wash your hands after handling any boa even if it is perfectly healthy. This is why I don't really like owning boas, I have one but I don't like the fact that it is in the house since I have a python collection going.