Group B streptococcal breast abscess

A 22-year-old women was admitted to the hospital with a large, tender supraareolar mass of her right breast. Cultures of the purulent aspirate yielded beta-hemolytic group B streptococcus. Surgical incision and drainage, together with therapy with erythromycin ethylsuccinate in this penicillin-allergic patient, resulted in cure. This is the first report, to our knowledge, of group B streptococcus causing human breast abscess.