Study on ascitic fluid complement 3 level in cirrhotic patients with spontaneous bacterial peritonitis and without spontaneous bacterial peritonitis

BACKGROUND/AIMS: Ascitic fluid Complement 3 (C3) concentration is the most important factor to offer local defense against infection of ascitic fluid. Hepatic synthesis of Complement 3 and its concentration in ascitic fluid is significantly reduced in patients with advanced cirrhosis. The aim of the study was to assess the level of Complement 3 in ascitic fluid in cirrhotic patients with and without spontaneous bacterial peritonitis (SBP) and to identify the group of cirrhotic ascites at risk of developing METHODOLOGY: A prospective case control study was carried out to compare the level of ascitic fluid Complement 3 concentration in patients with SBP (case-group) and without SBP (control-group). Ascitic fluid Complement 3 level was estimated in 15 patients with SBP (case) and another 15 patients without SBP (control). RESULTS: In the study, ascitic fluid Complement 3 concentration was 7.3+/-4.3 mg/dL in patients with SBP and 16.4+/-11.3 mg/dL in patients who did not develop SBP. CONCLUSIONS: Ascitic fluid Complement 3 level is significantly (P=0.009) reduced in cirrhotic patients who develop SBP.