Fig. 1: Summary of bacterial host species, multi-locus sequence types and genetic settings of blaIMP-4 in sequenced isolates.

a Pie chart showing key bacterial host strains of blaIMP-4. blaIMP-4 was noted in 7 bacterial genera and 68 bacterial host strains. b Genetic settings and bacterial host species of blaIMP-4 over course of study, as defined by three distinct periods. Abbreviations: No number, Lin lineage, ST sequence type.