Colistin Resistance and Extensive Genetic Variations in PmrAB and PhoPQ in Klebsiella Pneumoniae Isolates from South Korea
- 10 June 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Current Microbiology
- Vol. 77 (9), 2307-2311
- https://doi.org/10.1007/s00284-020-02074-4
Abstract
We investigated the colistin resistance of Klebsiella pneumoniae blood isolates from South Korea. Among 252 K. pneumoniae isolates, only 11 (4.4%) demonstrated colistin resistance, of which, one was resistant to all antibiotics but tigecycline. Multilocus sequence typing analysis revealed ten sequence types among the 11 colistin-resistant isolates, indicating independent occurrence of colistin resistance in K. pneumoniae. To understand the mechanism of colistin resistance, amino acid variations in PmrAB, PmrD, PhoPQ, and MgrB were investigated. Amino acid substitutions were identified in all the colistin-resistant K. pneumoniae isolates. Particularly, extensive alterations in the genes associated with colistin resistance were shared in four colistin-resistant isolates, suggesting recombination between these genes of unrelated isolates. Our results suggest that genetic recombination is responsible for colistin resistance in some K. pneumoniae isolates.Funding Information
- National Research Foundation of Korea (NRF-2019R1A2C2004879)
This publication has 23 references indexed in Scilit:
- A distinct alleles and genetic recombination of pmrCAB operon in species of Acinetobacter baumannii complex isolatesDiagnostic Microbiology and Infectious Disease, 2015
- Colistin Resistance Mechanisms in Klebsiella pneumoniae Strains from TaiwanAntimicrobial Agents and Chemotherapy, 2015
- Rapid Screening for Carbapenem Resistant Organisms: Current Results and Future ApproachesJournal of Clinical and Diagnostic Research, 2015
- Mechanisms of polymyxin resistance: acquired and intrinsic resistance in bacteriaFrontiers in Microbiology, 2014
- Colistin resistance in Klebsiella pneumoniaeInternational Journal of Antimicrobial Agents, 2014
- National Surveillance Study on Carbapenem Non-Susceptible Klebsiella pneumoniae in Taiwan: The Emergence and Rapid Dissemination of KPC-2 CarbapenemasePLOS ONE, 2013
- Nonclonal Emergence of Colistin-Resistant Klebsiella pneumoniae Isolates from Blood Samples in South KoreaAntimicrobial Agents and Chemotherapy, 2010
- Multidrug resistant AcinetobacterJournal of Global Infectious Diseases, 2010
- Multilocus Sequence Typing of Klebsiella pneumoniae Nosocomial IsolatesJournal of Clinical Microbiology, 2005
- Prevalence of Derepressed AmpC Mutants and Extended-Spectrum β-Lactamase Producers among Clinical Isolates of Citrobacter freundii , Enterobacter spp., and Serratia marcescens in Korea: Dissemination of CTX-M-3, TEM-52, and SHV-12Journal of Clinical Microbiology, 2005