M. J. Hill 
Microbial Metabolism In The Digestive Tract [PDF ebook] 

In this book an attempt has been made to give an update on the flora of the human digestive tract and its role in disease. This is a subject that has implications in many disciplines and therefore is aimed at not only microbiologists, but also clinicians, dentists, medical researchers, biochemists, and toxicologists who have a background knowledge of bacteriology but are not necessarily directly involved in research into the metabolic actions of gut bacteria.