MOlecular BIomarkers and Adherent and Invasive Escherichia Coli (AIEC) Detection Study In Crohn's Disease Patients

Inclusion Criteria: * Male or female between 18 and 75 years of age, inclusive; * With a diagnosis of ileal or ileo-colonic Crohn's disease for a minimum of 3 months prior to inclusion; * An ileocolonoscopy scheduled prior to study inclusion; * Agreeing to participate and to sign an informed consent form; * Able to perform stool collection, at home, according to protocol; * Covered by Health Insurance System and/or in compliance with the recommendations of National Law in force relating to biomedical research. Exclusion Criteria: * Colonic Crohn's disease of L2 phenotype based on Montreal classification; * Extensive small bowel resection (\> 100 cm) or short bowel syndrome * Bowel strictures/stenosis contraindicating ilecolonoscopy; * Currently with an ostomy or an ileoanal pouch; * Currently receiving total parenteral nutrition; * Bowel preparation received in the previous 3 months; * An increased risk of hemorrhage (patients with anticoagulant/antiplatelet therapy) * History of intestinal carcinoma and colorectal cancer; * History or presence of alcohol or substance abuse; * History of chronic uncontrolled disorders; * Current participation in an investigational product trial; * Less than 4 weeks since last participation in a clinical trial; * Subject inapt or unwilling to participate to the study; * Pregnant or breastfeeding mother; * Patient under guardianship.