Most common cause of peritonitis in adult male is:

Peritonitis The most common cause is a perforation of the abdominal viscous-most commonly, a perforated ulcer, may occur as a result of perforation of any pa of the bowel; other causes include a benign ulcer, a tumor, or trauma MC cause of peritonitis in adult male: Peptic ulcer perforation . It is usually poly-microbial - E. coli (aerobe) ; Bacteroides fragilis (anaerobe) . Treatment - Exploratory laparotomy + peritoneal lavage + repair of perforation / stoma formation