It is hard to say where and why your friend got IBD from, and I hope he put his collection down and did not sell it off claiming it to be healthy. This is one of the most morally incomprehensible act someone can do. It is hard to say that his newest accusation was the cuprite
I have heard of a boa at one of the collages that has IBD, and has shown no signs of the disease for over 15 years. I believe that stress brings predisposed boas to active cases of this disease. For instance the cooling for breeding or the shipping for an animal. These stressing factors weaken the immune system and bring on aliments like respiratory disease, regurgitation, and neurological problems.
Yes I do agree with you that the bp method is a less conventional method to detect the presence of this virus. But we have used mice, rats and even cats and dogs to test drugs, diseases, cancer and they have proven to have a positive outcome for all of us. Oh they have also been used to test makeup. A single ball python is a life but can save 100's of animals in someone’s collection. Until we push to get this blood test to market we are left in the dark when we purchase a boa.
This and above post from me come from the indirect and direct correspondences I have had with:
Dr Roger Klingenberg DVM
Dr. Elliott Jacobson, Florida State Universities Veterinary School
Dr. Dale Denardo, Berkeley
And of course my own life experiences and work.