Eggs yolk peritonitis (the presence of yolk material in the coelomic cavity) is a common cause of abdominal distension in birds. Yolk material by itself induces a mild inflammatory response and may be reabsorbed by the peritoneum. Because yolk is an excellent growth medium for bacteria, peritonitis may result from secondary bacterial infection. Localized to diffuse fibrinous peritonitis may result, and may lead to secondary ascites and organ inflammation or compromise in chronic cases.
