Contribution of a new mutation in parE to quinolone resistance in extended-spectrum-beta-lactamase-producing Escherichia coli isolates Sorlozano Puerto, Antonio Gutiérrez Fernández, José Jiménez Pacheco, Antonio Luna Del Castillo, Juan De Dios Martínez Torres, José Luis Mutations in the quinolone resistance-determining regions of gyrA, gyrB, parC, and parE were studied in 30 fluoroquinolone-resistant clinical isolates of Escherichia coli producing extended-spectrum beta-lactamases. Ten isolates showed a mutation in parE that was significantly associated with an increase in the MIC for fluoroquinolones. 2024-03-08T10:31:13Z 2024-03-08T10:31:13Z 2007-08 journal article Sorlozano A, Gutierrez J, Jimenez A, de Dios Luna J, Martínez JL. Contribution of a new mutation in parE to quinolone resistance in extended-spectrum-beta-lactamase-producing Escherichia coli isolates. J Clin Microbiol. 2007 Aug;45(8):2740-2. https://hdl.handle.net/10481/89876 10.1128/JCM.01093-07 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional American Society for Microbiolog