Figure 1: Phylogenetic relationship of outbreak isolates from AZP in 2013 mapped against reference type strain USA300 FPR3757.

Phylogenetic maximum likelihood tree constructed on the basis of SNPs was obtained by CSI phylogeny 1.4 (https://cge.cbs.dtu.dk/services/CSIPhylogeny/). A confidence score ranging from 0 to 1 (x100 during visualization in MEGA6 software) was calculated for robustness evaluation of the nodes. The scale bar indicates the evolutionary distance between the sequences determined by 0.02 substitutions per nucleotide at the variable positions.