Measurement of Intestinal Permeability in Intensive Care Patients With Single or Multiple Organ Failure

Inclusion Criteria: Patient with single organ failure, secondary to sepsis, hospitalized in intensive care for a foreseeable duration of \> 48 hours * SAPS2 between 20 and 40 at the sixth hour after the diagnosis of organ failure. * Consent from the patient or their trusted person. * Affiliation to a social security system. * Functional digestive tract and possible feeding (per os or via a nasogastric tube whose indication was determined independently of the study's needs). Second group of patients with multi-organ failure: * Multi-organ failure syndrome with at least 2 organ failures, secondary to sepsis. * SAPS2 between 60 and 80 at the sixth hour after the diagnosis of organ failure. * Consent from the patient or their trusted person. * Affiliation to a social security system. * Functional digestive tract and possible feeding (conscious patient able to swallow or with a nasogastric tube whose indication was determined independently of the study's needs). Exclusion Criteria: * Pregnant and breastfeeding women; * Minors; * Persons under administrative and judicial supervision; * Absence of a functional digestive tract (patient unable to swallow and absence of a nasogastric tube, contraindication to enteral feeding); * Patients with gastroparesis; * Refusal of the patient or their trusted person; * Patient with a SAPS2 at the sixth hour after the diagnosis of organ failure \< 20 or between 40 and 60 or \> 80.