Spontaneous bacterial peritonitis caused by Edwardsiella tarda: A case report

•Case of spontaneous bacterial peritonitis associated with E. tarda infection.•The patient had Child–Pugh A cirrhosis secondary to hepatitis C virus infection.•Surgical findings included redness and thickening of the cecal wall.•Purulent ascites without intestinal contents was observed.•E. tarda infection has a poor prognosis in patients with underlying disease.