hmm, ergot, its been a good while since ive heard anything about that mentioned. Thanks for refreshing my memory on the subject. I do believe that is some circumstances that this would have been the cause of supposed witch curses, at the same time you have to note that science today does not have all of the knowledge that was there at that time and of the knowledge lost alot could be related to the occult things like witchcraft. Im sure youve heard of voodoo priests and zombie powder hmm? Be that as it may there could very well have been people versed enough in strange forms of science to create concoctions of varied enough sorts to cause alot of the things associated with witch craft sans the outright absurd(flying etc.) If memory serves I also believe that there is a disease that science has recently begun to associate with the legends of vampirism, its the one where the symptoms involve a pale complexion and extreme sensitivity to sunlight.