Prevalence and Characterization of Plasmid-Mediated Quinolone Resistance Determinants
qnr and
aac(
6')-
Ib-
cr in Ciprofloxacin-Resistant
Escherichia coli Isolates from Commercial Layer in Korea.
J Microbiol Biotechnol 2020;
30:1180-1183. [PMID:
32423191 PMCID:
PMC9728193 DOI:
10.4014/jmb.2003.03058]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 05/14/2020] [Indexed: 12/15/2022]
Abstract
The prevalence and characterization of plasmid-mediated quinolone resistance (PMQR) determinants in ciprofloxacin-resistant Escherichia coli isolated from a Korean commercial layer farm were studied. A total of 45 ciprofloxacin-resistant E. coli isolates were recovered and all isolates were multidrug-resistant. Eight isolates have the PMQR genes aac(6')-Ib-cr, qnrS1, and qnrB4, and seven isolates exhibited double amino acid exchange at both gyrA and parC, and have high fluoroquinolone minimum inhibitory concentrations. Five transconjugants demonstrated transferability of PMQR and β-lactamase genes and similar antimicrobial resistance. Because PMQR genes in isolates from commercial layer chickens could enter the food supply and directly affect humans, control of ciprofloxacin resistance is needed.
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