Fig. 1.

—Global population structure of S. Dublin illustrated with a maximum-likelihood cladogram, GTR Gamma model, of 880 S. Dublin genomes rooted to S. Enteritidis (AM933172). The tree is inferred from an alignment of 4,098 core genes defined by Roary. Leaves are colored respective to the region of isolation. The outer colored ring denotes isolation source. The outermost barplots illustrate data of isolation and are scaled such that the higher the bar, the more recent the isolate was cultured and zeroed to a date of 1980. Genomes cluster into distinct clades associated with the area of isolation.