Meningitis caused by Streptococcus dysgalactiae in a preterm infant.

This report describes a case of meningitis caused by a Lancefield group C streptococcus (Streptococcus dysgalactiae) in a 9-week-old infant. Bacteria of this group rarely cause serious infections in man. The organism was identified as a member of Lancefield group C by the acid extraction method and as S. dysgalactiae by biochemical tests. The patient's condition responded well to penicillin and tobramycin therapy, with no obvious neurologic sequelae.