Fig. 4

Phylogenetic relationship between Pseudomonas aeruginosa isolates collected from retail food samples and publicly available genomes. Maximum likelihood tree of 662 P. aeruginosa isolates, colored by source and continent of origin. The phylogenetic branch lengths are given in nucleotide substitutions per site, therefore a branch of length 0.009 (as represented by the scale bar) equates to 26,141 substitutions, given that the core gene alignment consisted of 2,904,504 bp