Predominance of serotype V and frequency of erythromycin resistance in Streptococcus agalactiae in Ohio.

Objective: The purpose of this study was to test the serotype distribution and antibiotic sensitivity patterns of group B Streptococcus from three Ohio regions in comparison to other areas of the United States.

Study Design: Three hundred forty-nine group B Streptococcus isolates from three Ohio hospitals were serotyped specifically, and disk diffusion was used to determine antibiotic susceptibility.

Results: Serotype V was isolated most frequently (27%); major types Ia, Ib, II, and III had frequencies of 18%, 9%, 11%, and 17%, respectively.