Figure 2From: Phylogenetic analysis of Shiga toxin 1 and Shiga toxin 2 genes associated with disease outbreaksstx1 Maximum Likelihood Nucleotide Phylogenetic Tree (unrooted). Bootstrap values over 50% are displayed. Pipe-delimited strain names indicate identical sequences. Dates and locations of the isolates are shown if available. The horizontal bar shows 0.001 nucleotide substitutions per site.Back to article page