TRIAGE: TRIage of Sepsis At emerGency dEpartment

Inclusion Criteria: * Male or female aged over 18 years * Patient with a single acute infection site suspected or confirmed by the clinician on clinical or paraclinical manifestations. * Patient admitted to ED with at least two systemic inflammatory response syndrome (SIRS) criteria * Patient with symptoms for less than 72 hours upon arrival to the emergency department. * Patient requiring according to physician judgment of hospitalization for at least 48 hours for his septic episode * Patient having been informed of the conditions of the study and having signed the informed consent form Exclusion Criteria: * Patient arrived in an emergency room for over 6 hours. * Patient with septic shock upon arrival to the ED Patient with acute organ failure on arrival at emergencies other than septic. * Patient hospitalized in the week before inclusion. * Patient immunocompromised (HIV, transplanted, patients undergoing chemotherapy, patients receiving treatment\> 20 mg / day of prednisolone or equivalent). * Patient with known pathology among non-infectious pathologies potentially associated with SIRS * Patient diagnosed with sepsis within 30 days before the date of inclusion. * Patient has already been included in the study. * Minor Person. * Person refusing to sign the written consent form. * Pregnant woman parturient or nursing. * Patient with no social security insurance, with restricted liberty or under legal protection