gastrointestinal system disease peritonitis DOID:8283 UMLS_CUI:C0029823 ICD9CM:567.8 disease_ontology SNOMEDCT_US_2020_03_01:197183001 DOID:8863 DOID:8694 DOID:9233 A gastrointestinal system disease that involves inflammation of the peritoneum resulting from perforation of the gastrointestinal tract, which produces immediate chemical inflammation followed shortly by infection from intestinal organisms. Peritonitis can also result from appendicitis, diverticulitis, strangulating intestinal obstruction, pancreatitis, pelvic inflammatory disease, mesenteric ischemia, intraperitoneal blood, barium, or peritoneo-systemic shunts, drains, and dialysis catheters in the peritoneal cavity. The symptoms include abdominal pain and tenderness, fever, fluid in the abdomen, nausea, vomiting and low urine output. Retractile mesenteritis acute generalized peritonitis primary bacterial peritonitis sclerosing mesenteritis