[Prevalence of Streptococcus algalactiae serotype III in pregnant women].

Background: Group B streptococcus, or Streptococcus agalactiae, is a grampositive coccus related to infections in the mother and the newborn during peri and postnatal period.

Objective: To describe the prevalence of S. agalactiae serotype III and the susceptibility to antimicrobials in strains isolated from pregnant women.