1. Commensal intestinal microbiota and mucosal immune system development and function / Katarina Radulovic and Jan Hendrik Niess -- 2. Presentation of microbial signals via maternal cells : an evolutionary advantage of mammals / Pablo F. Perez, Anne Donnet-Hughes and Eduardo J. Schiffrin -- 3. Interactions of the intestinal microbiota with mucosal epithelial cells / Cherbuy Claire, Tomas Julie, Thomas Muriel and Langella Philippe -- 4. Pathogen-host cell interactions at the intestinal level : 88 lessons from cultured human fully-differentiated colon cancer Caco-2 and T84 epithelial cell lines / Vanessa Lievin-Le Moal and Alain L. Servin -- 5. Manipulation of the host-cell pathways by bacterial enteropathogens / Brice Sperandio and Philippe J. Sansonetti -- 6. The role of probiotics in prevention and treatment of GI infections / Christina M. Surawicz and Christopher Damman -- 7. The microbiota in inflammatory bowel disease / Philippe Marteau, Marion Leclerc, Patricia Lepage, Philippe Seksik, Harry Sokol and Joel Dore -- 8. Opportunistic pathogens in inflammatory bowel disease, and the relation with specific gene susceptibilities / Marianne Fraher and Fergus Shanahan -- 9. Opportunistic pathogens in inflammatory bowel disease, the case of adherent-invasive e. coli / Arlette Darfeuille-Michaud -- 10. Correction of microbiota disturbances or antagonism against specific pathogens in IBD / Paul K. Flanagan and Jonathan M. Rhodes -- 11. Probiotics in inflammatory bowel disease : modulation of the pathological immune or inflammatory activation. Their potential benefits in the different phases of the disease / Siew C. Ng and Ailsa L. Hart -- 12. Mechanisms, prevention and management of diarrhoea in enteral nutrition / Kevin Whelan and Stephane M. Schneider -- 13. Influence of the intestinal microbiota on the critically ill patient / Robert G. Martindale, Stephen A. McClave, Malissa Warren and Svetang Desai -- 14. Gut microbiota in obesity and Type-2 diabetes : links with diet and weight loss intervention / Judith Aron-Wisnewsky and Karine Clement.