Fig. 2From: Characterization and virulence clustering analysis of extraintestinal pathogenic Escherichia coli isolated from swine in ChinaPhylogenetic organization of group B2 and D isolates of different multi locus sequence types based on the neighbor-joining method. Numbers at the nodes are bootstrap values and the bar represents 0.001 nucleotide changes. Group B2 strains gather together (red circle), as do group D strains (blue circle)Back to article page