The most common cause of peritonitis is perforation of a hollow viscus such as perforation of the distal esophagus (Boerhaave syndrome), of the stomach (peptic ulcer, gastric carcinoma), of the duodenum (peptic ulcer), of the remaining intestine (e.g. appendicitis, diverticulitis, Meckel's diverticulum, IBD, intestinal infarction, intestinal strangulation, colorectal carcinoma, meconium peritonitis), or of the gallbladder (cholecystitis).  Other causes of infected peritonitis include spontaneous bacterial peritonitis and disruption of the peritoneum, such as in cases of  trauma, surgical wounds, continuous peritoneal dialysis, and intra-peritoneal chemotherapy.  Causes of non-infected peritonitis include endometriosis, blunt abdominal trauma, gastric carcinoma, peptic ulcer, pelvic trauma, and pancreatitis.
Peritonitis causes
Secondary peritonitis causes
Acute diarrhea causes
Acute cholecystitis causes
Peritonitis risk factors
Spontaneous bacterial peritonitis causes
Gastrointestinal perforation causes
Ascites causes