I'm dealing with a possible case of IBD, too. Still have a lot to learn. Its my sister's BCI.
How likely would it be to get a false negative on a live biopsy from a snake that is showing severe neurological signs? I'm worried that if we get the test done, it will be inconclusive. It might be better to euthanize him and have a full necropsy done. He's on his way out, as it is, and we really need to know.