Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Phylogenetic tree of E. coli. The tree is based on 1,548 conserved core gene clusters of 47 E. coli genomes. For this analysis, only bacteria with whole-genome sequences were used. The tree was rooted using Escherichia fergusonii. Scale units are in nucleotide replacements per site. The arrows mark strain O78:H19 ST88 isolate 789 (O78-9) and strain O1 (22). substr, substrain.
