Community acquisition of group B Streptococcus by infants of colonized mothers

Forty-six infants of women known to be colonized by group B Streptococcus (GBS) during the third trimester of pregnancy were not colonized by GBS at the time of discharge from the hospital nursery. At 6 to 8 weeks of age, two of these infants (4.3%) were found to harbor GBS. The rate of community acquisition of GBS by uncolonized infants appears to be low.