Here's an article from July '08 Scientific American magazine.
http://www.sciam.com/article.cfm?id=jeremy-nicholsons-gut-instincts
I just wanted people to be aware of this up and coming research field. This guy is looking at how "gut bugs" contribute to illness.
"Nicholson says, “almost every sort of disease has a gut bug connection somewhere.”"
I thought it was interesting. It mentions VSL-3. "One exception is VSL #3, a combination of eight bacterial species sold in packet form by the Gaithersburg, Md.–based VSL Pharmaceuticals. In double-blind, placebo-controlled trials, the colonies effectively treated ulcerative colitis and irritable bowel syndrome."
I know a lot of people here take that. I might give it a try!