>>At least none that I've heard of. Man, that would be SCARY though. Scary enough to make me switch to colubrids! LOL!
Well, I recall reading about a case found in a California Kingsnake! It may not be true, and I cannot recall where I read that, sorry. But, if that's the case then you better switch to turtles or tortoises. 
Try this: http://www.vetmed.ufl.edu/sacs/wildlife/IBDINFO.html
The page has not been updated from what I can tell in some time, but it's probably the best page for info about IBD. There are also some folks that don't believe IBD exists at all (IBD being a label 'catch all' for a number of diseases that cannot be accurately described). But, that's another issue all together...
Matt
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"Change what you cannot accept... do not accept what you can't change!"
Tod Ashley C.$.C.