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Phylogenetic analysis of the global E. coli ST457 cohort, highlighting the source diversity. The five primary clades of ST457 are defined using H antigen from clade-typical serotype. Two clades of H25 were distinguished based on the most common origin of the strains, separating North or South hemisphere. Two minor clades (MC1 and MC2) were not evaluated separately. The white circle indicates that the specific metadata was not available.
