Figure 1From: Dominance of multidrug resistant CC271 clones in macrolide-resistant Streptococcus pneumoniae in ArizonaChanges in population structure over time in dual mef (E)/ erm (B)-positive, mef (E)-positive, and erm (B)-positive S. pneumoniae clinical isolates. No isolates positive for mef(E) or erm(B) genes were collected in 2001-2002. ST, sequence type; NF, sequence type not found; NT, not typedBack to article page