FIGURE 2.

Proposed evolutionary history of S. aureus ST59 showing the separate North American and East Asian sub-lineages. Box colors correspond to the sub-group (WGS-1 to 6) colors described in Figure 1. Nodes are represented by black circles with the estimated node date (from BEAST analysis) shown. Molecular data is indicated for each branch, with the numbers of isolates carrying a trait indicated in square brackets when it represents an exception. Location of isolation is shown, along with the number of isolates from each location in square brackets, and the years of isolation in round brackets. The red node represents the point at which the NA and EA sub-lineages co-evolved, as described by Ward et al. (2016).