Assessment of multidrug resistance, clonality and virulence in non-PCV-13 <i>Streptococcus pneumoniae</i> serotypes in Canada, 2011–13

Abstract

Non-PCV-13 serotype 22F is increasing in Canada through the rapid clonal expansion of ST433. Numerous new STs associated with serotype 33F indicate the potential divergence of the serotype. Serotypes 15A and 35B in Canada are related to international clones of S. pneumoniae.