Compared to our previous study in 2011, the erm (B)-positive rate in non-IPD isolates in the PCV13 period increased, associated with an increasing trend of non-PCV7 serotypes, despite the high proportion of erm (B) in the PCV7 serotypes, such as 6B, 19F and 23F, which has decreased by PCV7.
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Emerging non-PCV13 serotypes of noninvasive Streptococcus pneumoniae with macrolide resistance genes in northern Japan.
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