Restriction Profiling of 23S Microheterogenic Ribosomal Repeats for Detection and Characterizing of E. coli and Their Clonal, Pathogenic, and Phylogroups

Figure 4

Analysis of distribution of Hae III profiles, phylogroups, and pathovars within the global alignment dendogram construct comprising 57 E. coli genomes. The dendogram of the whole genome sequence of 57 genomes was obtained from the NCBI web site for E. coli and was redrawn using Photoshop CS6 for colour coordination for pathogenic and nonpathogenic strains and inputting the clonal groups and phylogroups (http://www.ncbi.nlm.nih.gov/genome/?term=escherichia+coli). Among the 57 genomes, 32 were of type I (56%), 18 were of type III (31%), and 6 and 1 were of type IV (10%) and type II (2%), respectively, showing that type I is predominant and type II the rarest. To correlate between the phylogroups, Hae III profiles, and pathovars, the lineages were considered as clades derived from various divergence point (D) during the course of evolution.