The differences between Escherichia coli strains associated with symptomatic and asymptomatic urinary tract infections (UTIs)remain to be properly determined. Here we examined the prevalence of plasmid types and bacteriocins, as well as genetic relatedness, in a deﬁned collection of E. coli strains that cause UTIs. Comparative analysis identiﬁed a subgroup of strains with a high number of virulence genes (VGs) and microcins M/H47. We also identiﬁed associations between microcin genes, VGs, and speciﬁc plasmid types
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