“Peritonitis is an inflammation of the peritoneum, the thin tissue that lines the inner wall of the abdomen and covers most of the abdominal organs. Peritonitis may be localized or generalized, and may result from infection (often due to rupture of a hollow abdominal organ as may occur in abdominal trauma or inflamed appendix) or from a non­infectious process.”Early prognostic evaluation of patients with peritonitis is desirable to select high­risk patients for intensive management and also to provide a reliable objective classification of severity and operative risk. This study attempts to evaluate the use of scoring Mannheim Peritonitis Index (MPI) in patients with  peritonitis. This prospective study was conducted between July 2016 to September 2017 on patients with abdominal pain admitted to S.B.K.S.& M.I.RC. Dhiraj Hospital Piparia Vadodara.

Keywords: Peritonitis; Mannheim Peritonitis Index.