Population snapshot of 225 S. pneumoniae
strains revealed by an eBURST analysis. Lines indicate the presence of single-locus-variant links in particular sequence types, indicated by circles. The size of the circle corresponds to the number of isolates belonging to the sequence type (ST). The green ST numbers indicate serotype 6A or 6C isolates, the black numbers indicate 6B or 6D isolates, and the pink numbers indicate isolates from the two groups.