Peritonitis
			
			Definition:
			An inflammation of the peritoneum, the membrane that lines the wall of the abdomen and covers the organs.
			
			 Causes, incidence, and risk factors:
			Types of peritonitis include: Intraabdominal abscess (abdominal abscess)--a collection of pus in the abdomen--may cause peritonitis; before peritonitis develops it can still cause symptoms that are similar or identical to peritonitis.
			
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