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The Ongoing Genetic Adaptation of Streptococcus pneumoniae

ABSTRACT Streptococcus pneumoniae has demonstrated a remarkable ability to adapt during the conjugate vaccine era. The increasing incidence of serotype 35B disease and emergence of a multidrug-resistant clone reported in this issue of the Journal of Clinical Microbiology (L. Olarte et al., J Clin Microbiol 55:724–734, 2017, https://doi.org/10.1128/JCM.01778-16 ) underscore the limitations of pneumococcal vaccines that target the polysaccharide capsule.