Minimum Spanning Tree analysis based on 96-MLST allelic profiles identifies seven distinct lineages by imposing a maximum threshold of 75 different loci.

<p>The Minimum Spanning Tree analysis was performed by using PHYLOVIZ on the 96-MLST alleles of the 66 strains considered in this study. The lineages identified by applying the threshold of 75/96 different loci are highlighted with shadowed shapes and named according to the lineage identification of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0061003#pone-0061003-g002" target="_blank">Figure 2</a>.