Table 1 Inclusion and exclusion criteria

∙ Age ≥ 18 years

∙ Patients operated for purulent or fecal peritonitis (Hinchey stage III and IV) secondary to perforated diverticulitis of the left colon and treated by resection with primary anastomosis

∙ Patient having read and understood the information letter and signed the Informed Consent Form

∙ Patient able to comply with the study protocol, in the investigator’s judgment

∙ Patient affiliated with, or beneficiary of a social security (health insurance) category

∙ Physical states that prevent patient participation (e.g. septic shock or multivisceral failure)

∙ Steroid treatment > 20 mg daily

∙ Prior pelvic irradiation

∙ Immunocompromised status

∙ American Society of Anesthesiologists grade IV

∙ Peritonitis secondary to perforated diverticulitis of the right colon

∙ Patient is a pregnant or breastfeeding (lactating) woman or intending to become pregnant during the study

∙ Person deprived of liberty by administrative or judicial decision or placed under judicial protection (guardianship or supervision)