peritonitis is typically caused by
Peritonitis is most often caused by introduction of an infection into the otherwise sterile peritoneal environment through organ perforation, but it may also result from other irritants, such as foreign bodies, bile from a perforated gall bladder or a lacerated liver, or gastric acid from a perforated ulcer.epending on the underlying pathology, the resultant peritonitis may be infectious or sterile (ie, chemical or mechanical). Intra-abdominal sepsis is an inflammation of the peritoneum caused by pathogenic microorganisms and their products.