Figure 2

Phylogenetic analysis of Pseudomonas aeruginosa isolates. Maximum likelihood phylogenetic tree built with core genome SNPs based on mapping to the PAO1 excluding SNPs identified in regions that had arisen by recombination. (a) The original tree where the scale bars represent the number of substitutions per site. (b) Magnified tree showing branches and groups. Strains used in this study are indicated by distinct colour circles. Relative positions of few reference strains are shown, which are P. aeruginosa VRFPA04, P. aeruginosa UCBPP-PA14, P. aeruginosa PAO1, and P. aeruginosa DK2.