The Group B streptococcus has only recently been recognized as a cause of serious clinical disease, especially in infants under three months of age. These organisms are normally found in the female genital tract and also exist, at a lower rate, in male urethras. During labor and delivery, they are transmitted to the fetus in utero or during passage through the birth canal. Group B streptococcal infections in infants are associated with high mortality and sequelae rates despite antibiotic administration.