Inclusion Criteria:  Patients who meet the International criteria for the classification of Behçet's disease, revised in 2013) Patient who had developed the disease in the 5 years preceding the study.  Exclusion Criteria:  Pregnant or breastfeeding women, or women who may be pregnant or breastfeeding. Subject placed under judicial protection. Patient had received antibiotic or probiotic or symbiotic therapy in the 6 weeks preceding inclusion