Boid Encephalopathy is all inclusive. It includes ALL types of brain disease that may affect boids, NOT necessarily IBD (which is actually believed to be a retrovirus that shuts down the nervous and circulatory systems).
Here is a really interesting article I found on Encephalopathy in all types of snakes, spefically a case in a kingsnake (not a boid, but the article does mention boid brain disease cases):
http://www.jwildlifedis.org/cgi/reprint/39/2/431.pdf
And here is an article I wrote specifically on IBD:
http://ball-pythons.net/forums/showt...991#post688991
Unfortunately, not a whole lot is known about brain disease in these animals because most people do not pay to perform necropsys on their pets after they pass.
Hope this helps, and your little one gets better!