Co-occurrence of three different plasmids in an extensively drug-resistant hypervirulent Klebsiella pneumoniae isolate causing urinary tract infection

Journal of Global Antimicrobial Resistance

Xu Jia¹  Xiaokui Zhu²  Hongling Lu²  Hong Song³  Chuanyu Sun⁴  Changwu Yue⁵  Xiaodie Zhan⁶  Hongyin Chen⁶  Xin Liu⁶  Chenxin Liu⁶ 

[1] Corresponding authors.;Department of Biochemistry, Zunyi Medical University, Zunyi, Guizhou, China;Department of Microbiology, Zunyi Medical University, Zunyi, Guizhou, China;Huashan Hospital, Fudan University, Shanghai, China;Key Laboratory of Microbial Drugs Innovation and Transformation, Medical College, Yan’an University, Yan’an, Shaanxi, China;Non-coding RNA and Drug Discovery Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan, China;

关键词: Klebsiella pneumoniae;    Hypervirulent;    Extensively drug-resistant;    Plasmid;    ST11;   

DOI  :  

来源: DOAJ

【 摘 要 】

Objectives: A single carbapenem-resistant, hypervirulent Klebsiella pneumoniae strain has attracted major public concern. The aim of the present study was to better understand the antimicrobial resistance and genetic characteristics of Klebsiella pneumoniae strain XJ-K1. Methods: Klebsiella pneumoniae strain XJ-K1 was isolated from a urine specimen of a 69-year-old male patient in a teaching hospital in Shanghai, China, in January 2018. Antimicrobial susceptibility testing, string test, whole-genome sequencing, bioinformatics analysis and phylogenetic analysis were performed in this study. Results: Klebsiella pneumoniae XJ-K1 was an extensively drug-resistant (XDR) hypervirulent strain that showed high-level resistance to antibacterial agents. Three novel plasmids were discovered in strain XJ-K1, including a 207,409-bp IncHI1B-type rmpA2-bearing pLVPK-like virulence plasmid, a 130,628-bp Col156/IncFIB/IncFII-type aadA2-, sul1-, mph(A)- and dfrA12-bearing MDR plasmid, and a 99,408-bp IncFII/IncR-type blaKPC-2-, blaTEM-1-, blaCTX-M-65-, blaSHV-12-, rmtB- and fosA3-bearing MDR plasmid. Sequence analysis of the chromosome revealed that the aadA2, fosA and sul1 genes were harboured by XJ-K1. Multilocus sequence typing (MSLT) showed that XJ-K1 was ST11. Conclusions: A large number of resistance genes and a pLVPK-like virulence plasmid carried by Klebsiella pneumoniae strain XJ-K1 might be the main reasons leading to the XDR and hypervirulent phenotype. To the best of our knowledge, this is the first report in China on the co-occurrence of a pLVPK-like virulence plasmid and two MDR plasmids in a single ST11 XDR and hypervirulent Klebsiella pneumoniae isolated from patient urine, which is a serious concern for its further spread.

【 授权许可】

Unknown