Figure legend
Figure 1. Genomic and phylogenetic analysis of the 56 Shiga
toxin-producing Escherichia coli (STEC) strains sequenced in this
study. A maximum-likelihood phylogenetic tree was generated using the
core-genome Single Nucleotide Polymorphisms (SNPs) and midpoint rooted.
The isolate locations are represented by color bars. The presence of a
virulence gene is denoted by a pink pie. ”-” in the sequence type (ST)
column indicates unrecognized ST in the MLST database; ”-” in thestx columes indicates the absence of a stx gene. The first
letter in the name of each isolate indicates its animal origin: S,
sheep; C, cattle.
Figure 2. Genetic relatedness of the Shiga
toxin-producing Escherichia coli (STEC) isolates in this study to
the human HUSEC isolates based on MLST. Each pie represents a cluster
of isolates assigned to the same ST; the size of a pie is proportional
to the amount of isolates in the group. The colors of and within each
pie indicates the source of the isolates: green, sheep; red, cattle;
blue, HUSEC. The numbers on the lines between pies indicates the number
of allelic difference between two STs.