Small Intestinal Bacterial Overgrowth Obese

Modification of Digestive Flora After Gastric Bypass : Pilot Study on Microbial Overgrowth Using Gas Chromatography

The objective of this research is to determine the incidence of microbial overgrowth of the small intestine before and after a gastric bypass. For this purpose, the study is based on the analysis of the expired hydrogen H2 with gas chromatography before surgery and at 1, 3, 6, 12, 18 and 24 months.

Inclusion Criteria:

• Severe obesity (BMI>35kg/m² with at least one comorbidity or BMI>40kg/m² without comorbidity) and after medical care for at least 6 months
• Patient who will follow bariatric surgery by bypass gastric
• Social insurance affiliation
• Signature of the informed consent

Exclusion Criteria:

• Contraindication criteria for bariatric surgery (cognitive or mental severe disorders, severe and non-stabilized eating disorders, etc.)
• Chronic inflammatory bowel disease (Crohn's disease, hemorrhagic rectocolitis)
• Previous intestinal surgery
• Antibiotic periodicity treatment of less than 3 months
• Other diseases responsible for bacterial overgrowth
• Pregnancy or breastfeeding