Fig. 2

Phylogenetic relationships of E. coli strains. A phylogenetic tree based on maximum likelihood method was generated by MEGA5 with nucleotide sequences of seven MLST genes. Bootstrap values (percentages of 1000 replications) greater than 50 % are shown at each node. The scale bar represents 0.01 nucleotide substitutions per site. E. fergusonii ATCC 35469 was used for the out-group. Each color indicates the phylogenetic groups of E. coli (red A; yellow B1; blue E; purple D; green B2). ^a A strain isolated from the feces of patient with UTI [28], but its pathotype is yet to be identified