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Molecular epidemiology and resistome analysis of multidrug-resistant ST11 Klebsiella pneumoniae strain containing multiple copies of extended-spectrum β-lactamase genes using whole-genome sequencing

 Roshan D. Souza  ;  Naina Adren Pinto  ;  Insik Hwang  ;  Hwang Younjee  ;  Young Lag Cho  ;  Hyunsoo Kim  ;  Dongeun Yong  ;  Jongrak Choi  ;  Kyungwon Lee  ;  Yunsop Chong 
 New Microbiologica, Vol.40(1) : 38-44, 2017 
Journal Title
 New Microbiologica 
Issue Date
Anti-Bacterial Agents/pharmacology ; Drug Resistance, Multiple, Bacterial ; Genome, Bacterial ; Genome-Wide Association Study/methods ; Humans ; Klebsiella pneumoniae/drug effects ; Molecular Epidemiology ; Phylogeny ; beta-Lactamases/genetics
Extended-spectrum β-lactamase ; Multiple parallel sequencing ; ST11
The aim of this work was to investigate the mechanism responsible for multidrug resistance in ST11 Klebsiella pneumoniae YMC 2013/7/B3993 containing multiple copies of ESBL genes using multiple parallel sequencing technology. In-depth analysis of the strain revealed multiple copies of ESBL genes, 2 copies of blaSHV-12 and 1 copy of blaCTX-M-15. Furthermore, 1 copy of blaOXA-9 and 3 copies of blaTEM-1 were found. The insertion of Tn1331 was detected, which consisted of blaOXA-9, blaTEM-1, aac(6')-lb-cr, and aadA1 genes. The acquisition of multiple copies of resistance genes was due to the insertion of transposons in the bacterial genome and plasmid. The genotypic analysis revealed that the isolates belonging to ST11 showed severe resistance phenotypes and greater dissemination potential. To the best of our knowledge, this is the first report demonstrating multiple copies of same ESBL genes in K. pneumoniae ST11 isolate. Furthermore, massive parallel sequencing studies of genetic factors to enhance the fitness of this type strain would be warranted to determine whether ST11 K. pneumoniae can spread the KPC-type gene.
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1. College of Medicine (의과대학) > Dept. of Laboratory Medicine (진단검사의학교실) > 1. Journal Papers
Yonsei Authors
용동은(Yong, Dong Eun) ORCID logo https://orcid.org/0000-0002-1225-8477
이경원(Lee, Kyungwon) ORCID logo https://orcid.org/0000-0003-3788-2134
최종락(Choi, Jong Rak) ORCID logo https://orcid.org/0000-0002-0608-2989
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