a rapid exhalation would be an effective transmission method of secretions. a sneeze, though more powerful, is not needed.

I think we're getting bogged down here....let's focus on getting the necropsy done.

Also, as for another snake coming in, it would be best if you could either put it off or house it at someone else's house for the time being.

I would also not mention IBD at the reptile show. Unless it's diagnosed, there's no need to cause a panic.