Surveillance of Levofloxacin Resistance in Helicobacter pylori Isolates in Bogotá-Colombia (2009-2014).

Although resistance between each year was not significantly different, when comparing the resistant rate between 2009 and 2014 it was highly significant (p = 0.001) with a 15.5% difference ( Fig 2 ). gyr A Mutations Mutations in levofloxacin resistant strains were present in quinolone resistance-determining region (QRDR) at positions 87 and 91.

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