Braak has been working for more than a decade on his hunch that PD is caused by some ŽinfectionŽ of the gut ( bacterial, prionic, or other). In fact more and more it is thought that a lot of neurodegenerative diseases stem from some sort of infection that triggers an immune response that damages the STN. Other factors like predisposition would come into play maryse ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn