Fig. 3

Phylogenetic relationship of the two MSSA isolates (blue, bottom right) within the context of published ST45 genomes (n = 1,689) visualized in iTOL (A). A core genome of 1,528 genes present in 99% of the collection was selected, and sample-wise alignments of the gene sequences were used to infer a phylogenetic tree using a maximum likelihood method. The resulting tree was midpoint rooted. For each sample, the metadata available through Pathogenwatch is illustrated as rings surrounding the phylogeny, containing (from inner to outer rings): geographic origin, decade and source. The MSSA isolates illustrated close genomic similarity to samples from the United Kingdom (UK), United States of America (USA) and Australia (B).