Investigation of the Rapid Emergence of Colistin Resistance in a Newborn Infected with KPC-2-Producing Hypervirulent Carbapenem-Resistant Klebsiella pneumoniae

被引:0
作者
Wang, Jiaao [1 ]
Chen, Hongbin [1 ]
Li, Mei [2 ]
Guo, Yinghui [2 ]
Liu, Si [1 ]
Tu, Shangyu [1 ]
Zhang, Xiaoyang [1 ]
Zhang, Yawei [1 ]
Zhao, Chunjiang [1 ]
Wang, Xiaojuan [1 ]
Wang, Hui [1 ]
机构
[1] Peking Univ, Peoples Hosp, Dept Clin Lab, 11 Xizhimen South St, Beijing, Peoples R China
[2] Childrens Hosp Hebei Prov, Dept Clin Lab, Shijiazhuang, Hebei, Peoples R China
关键词
Hypervirulent carbapenem-resistant; Klebsiella pneumoniae; Whole-genome sequencing; KPC-2; Within-host evolution; mgrB; MOLECULAR EPIDEMIOLOGY; RISK-FACTORS; PREVALENCE; MECHANISMS; EVOLUTION; CHINA; ST11;
D O I
10.1016/j.jgar.2024.05.021
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Objectives: Hypervirulent carbapenem-resistant Klebsiella pneumoniae (hv-CRKp) poses a significant threat to public health. This study reports an infection related to hv-CRKp in a premature infant and reveals its colistin resistance and evolutionary mechanisms within the host. Methods: Three KPC-producing CRKp strains were isolated from a patient with sepsis and CRKp osteoarthritis who had been receiving colistin antimicrobial therapy. The minimum inhibitory concentrations (MICs) of ceftazidime, ceftazidime-avibactam (CAZ-AVI), meropenem, imipenem, tigecycline, amikacin, minocycline, sulfamethoxazole/trimethoprim, ciprofloxacin, levofloxacin, aztreonam, cefepime, cefoperazone/sulbactam, piperacillin/tazobactam, and colistin were determined using the microbroth dilution method. The whole-genome sequencing analysis was conducted to determine the sequence types (STs), virulence genes, and antibiotic resistance genes of the three CRKp strains. Results: Whole-genome sequencing revealed that all three CRKp strains belonged to the ST11 clone and carried a plasmid encoding blaKPC-2 . The three strains all possessed the iucABCDiutA virulence cluster, peg-344 gene, and rmpA/rmpA2 genes, defining them as hv-CRKp. Further experiments and whole-genome analysis revealed that a strain of K. pneuomniae had developed resistance to colistin. The mechanism found to be responsible for colistin resistance was a deletion mutation of approximately 90 0 0 bp including the mgrB gene. Conclusion: This study characterizes colistin resistance of the ST11 clone hv-CRKp during colistin treatment and its rapid evolution within the host. (c) 2024 The Author(s). Published by Elsevier Ltd on behalf of International Society for Antimicrobial Chemotherapy. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ )
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页码:265 / 270
页数:6
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