Figure 1: The evolutionary history was inferred using the Neighbor-Joining method. The optimal tree with the sum of branch length = 62.11780002 is shown. The phylogenetic tree was linearized assuming equal evolutionary rates in all lineages The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The evolutionary distances were computed using the Maximum Composite Likelihood method and are in the units of the number of base substitutions per site. Codon positions included were 1st + 2nd + 3rd + Noncoding. All positions containing gaps and missing data were eliminated from the dataset. There were a total of 431 positions in the final dataset. Phylogenetic analyses were conducted in MEGA4. Model: Nucleotide: Maximum Composite Likelihood [1] = Shigella; [2] = Input query sequence; [3] = E. coli; [4] = Salmonella.