Fig. 2: Bayesian evolutionary analysis shows recent common evolution of IncHI2 plasmids from E. coli and S. enterica isolates collected from the same samples and environments.

Bayesian estimation of IncHI2 plasmid divergence times using sequencing data from 27 E. coli and 27 S. enterica strain pairs collected from the same samples, with the reference pAPEC-o1-R plasmid used as an outgroup (GenBank DQ517526.1). Sample pair numbers are given with each number corresponding to an E. coli and S. enterica isolate recovered from the same sample. Red rectangles indicate two areas of recent evolution containing IncHI2 plasmids from both species.