15 In recent years, an increasing trend of serotypes V and Ib and a decreasing trend of serotypes II and III have been reported among pregnant women in Brazil. 16 An evaluation of isolates obtained from the adult oropharynx in the USA showed that the most frequent serotype was III, followed by V, Ib, and II. 7 In our population, six serotypes were found (Ia, Ib, II, III, and V) in nasopharyngeal samples, and the GBS6 vaccine in development might provide high coverage for GBS obtained from the upper respiratory tract of women. 3 However, fourteen samples in our population were non-typeable.
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