 2. People involved Patients with uncomplicated AP, will be offered to participate to the study after consultation in emergency room service or health service, in absence of non-inclusion criteria immunodepression known, severe sepsis, allergy to antibiotics, pregnancy, lactation .... In presence of abscesses, obstruction on the urinary tract, or infection on stranger material device requiring, in most cases, a medical-surgical treatment, they will not be eligible under the study. 