Group A streptococcal peritonitis in infancy.

Primary peritonitis in infancy is a rare condition. It is usually associated with a severe pathological process, such as nephrotic syndrome. When it affects previously healthy infants it causes diagnostic and therapeutic difficulties. Pneumococci, streptococci and Haemophilus influenzae are possible causative agents, other causes are rare. The clinical course of two infants with group A streptococcal peritonitis is described.