Calprotectin for Rapid Diagnostic Infection Spontaneous of Ascites

The prognosis of spontaneous bacterial peritonitis (ISLA) remains a serious complication of cirrhosis. Rapid diagnosis of ISLA is a key issue for improving the prognosis. The determination of calprotectin in ascites, used for the diagnosis of infection of ascitic liquid, could allow the diagnosis in a very short time (about 30 minutes). To date, the determination of calprotectin in ascites was not evaluated properly. The investigators would thus evaluate the interest of the determination of calprotectin in ascites for the rapid diagnosis of ISLA in cirrhotic patients, like you, hospitalized for decompensation of their disease. The main purpose of this pilot study will determine the optimal threshold calprotectin in ascites for diagnosis of ISLA.