Longitudinal molecular analysis of clinical and fecal <i>Escherichia coli</i> isolates at a Veterans Affairs Medical Center in Minnesota, USA, 2012-2019.

The exceptions, which were barely statistically significant, were (i) a shorter recurrence interval for isoclonal group A isolates (10 pairs: median interval, 45 days) than for isoclonal group C isolates (four pairs: median interval, 90.5 days) ( p = 0.02), and for fluoroquinolone-resistant isoclonal isolates (59 pairs: median interval, 56 days) than for fluoroquinolone-susceptible isoclonal isolates (60 pairs: median interval, 65 days) ( p = 0.04).

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