Fig. 2
From: Chromosomal features of Escherichia coli serotype O2:K2, an avian pathogenic E. coli
Maximum likehood tree of APEC_O2 relative to other closely related strains. The phylogenetic tree was constructed from the concatenated seven housekeeping genes (adk, fumC, gyrB, icd, mdh, purA, and recA) in MEGA software version 7. Escherichia fergusonii (ATCC35469) was used as an out-group. Bootstrap values of 500 replicates are indicated at the nodes. The scale bar indicates nucleotide diversity between the strains