FIG 1.

Phylogeny based on a spatiotemporal Bayesian framework. The figure shows a maximum clade credibility tree (relaxed lognormal clock; constant population size) based on 6,795 core genome SNPs, indicating four definite lineages. The length of branches represents evolutionary time, and the dashed line perpendicular to the branches indicates the age intervals in 50-year increments. The names of important nodes are enlarged. The leftmost color strip indicates the lineage as follows: I, red; II, orange, III, blue; IV, green. Other color strips show information about the fastSTRUCTURE groups, geographic origins, multilocus sequence types (MLST), and antibiograms (predicted by genotypes).