Mutators and long-term molecular evolution of pathogenic Escherichia coli O157:H7.
It has been proposed that an increased mutation rate (indicated by the frequency of hypermutable isolates) has facilitated the emergence of Escherichia coli O157:H7. Analysis of the divergence of 12 genes shows no evidence that the pathogen has undergone an unusually high rate of mutation and molecular evolution.
Escherichia coli O157↗