Summary of mutational and recombination changes in the 3 O55:H7/O157:H7 genomes.

aThe CB9615, EDL933 and Sakai lineages are the strain specific lineages as shown in Figure 1. The O157 lineage is the segment of the O157:H7 lineage prior to divergence of EDL933 and Sakai. Events shown in the O55/O157 and Sakai/EDL933 rows are those allocated to the O55/O157 and Sakai/EDL933 divergence respectively, but not to a specific lineage. bExcludes SNPs in regions thought to have entered by recombination. cNS, non-synonymous; S, synonymous; I, intergenic; NC, in non-coding genes; ins, insertion; del, deletion; indel, insertion or deletion (not distinguishable). dThe number in brackets is number of genes carrying at least 1 non-synonymous SNP. eCovers only recombinant regions longer than 20 bps. fIncludes 3388 SNPs in the large recombinant event involving the O-antigen gene cluster. gExcludes the 3388 SNPs in the large recombinant event involving the O-antigen gene cluster. hThe 3388 SNPs in the large recombinant event involving the O-antigen gene cluster.