An interesting topic. Steve recently sent me a book on medical uses of venom...awesome book. In the book the author does discuss the Duvernoy's gland and the fact that snakes with this gland can actually be classified as venomous, although they do little actual damage. The book cites a couple of cases in which people bit more than once...over an extended period of time...began to show symtoms, including systemic symptoms of envenomation. The author states that it is actually envenomation that occurs and not an allergic reaction (we actually had a discussion on here about this before). He states that the venom produces from the gland actually helps in subduing prey upon ingestion. I know that I am allergic to just about everything. Even carefresh makes me get red and itchy. But, I have been bit by my snakes many times recently...enough to draw blood...and I have never had any kind of reaction to date.