Group G streptococcus.

Three patients with serious infections due to beta hemolytic streptococci, Lancefield group G are presented. The clinical syndromes are septicemia with possible endocarditis in a patient with laryngeal carcinoma, septic arthritis in a healthy boy and endocariditis in an adult with no previous underlying valvular disease. All were treated with intravenous penicillin and recovered. The clinical and microbiologic significance of recognizing the organism is emphasized.