Peritonitis is an inflammation or infection of the peritoneum. The peritoneum is a thin tissue lining that covers the inside of the abdominal cavity. It also covers the outside of the intestines and other abdominal organs.

There are several types:

  • Primary
  • Secondary
  • Peritoneal dialysis-related

Peritonitis is a serious condition. It requires immediate treatment. If not promptly treated, it can be fatal.

  • Primary peritonitis—occurs when there is a buildup of fluid in the abdomen. This is called ascites. It is caused by chronic liver disease, among other conditions.
  • Secondary peritonitis—caused by bacteria that enter the abdominal cavity. Can be due to an injury or a condition, such as a ruptured appendix.
  • Dialysis-related peritonitis—caused by bacteria that enter the peritoneal cavity during or after peritoneal dialysis (a treatment for kidney disease).
Secondary Peritonitis
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