Emergence of carbapenem-resistant Enterobacter hormaechei ST93 plasmids co-harbouring blaNDM-1, blaKPC-2, and mcr-9 in bloodstream infection

被引:2
|
作者
Wu, Wenhao [1 ]
Wang, Jie [2 ]
Zhang, Piaopiao [1 ]
Wang, Nanfei [1 ]
Yuan, Qing [1 ]
Shi, Weixiao [1 ]
Zhang, Xiaofan [3 ]
Li, Xi [3 ]
Qu, Tingting [1 ]
机构
[1] Zhejiang Univ, Affiliated Hosp 1, Natl Clin Res Ctr Infect Dis, Collaborat Innovat Ctr Diag & Treatment Infect Dis, Hangzhou, Peoples R China
[2] Zhejiang Univ, Affiliated Hosp 1, Sch Med, Resp Dept, Hangzhou, Peoples R China
[3] Zhejiang Prov Peoples Hosp, Affiliated Peoples Hosp, Hangzhou Med Coll, Lab Med Ctr,Dept Clin Lab, Hangzhou, Peoples R China
基金
中国国家自然科学基金;
关键词
Enterobacter hormaechei; blaKPC-2; blaNDM-1; mcr-9; Fitness cost; Carbapenem resistance; COLISTIN RESISTANCE; MCR-9;
D O I
10.1016/j.jgar.2023.06.009
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Objectives: We isolated a strain of Enterobacter hormaechei, ECC2783, co-harbouring blaNDM-1, bla KPC-2 and mcr-9 plasmids from a bloodstream infection and investigated its biological features.Methods: The presence of carbapenemase genes and mcr-9 was confirmed by polymerase chain reaction amplification. Whole genome sequencing and genomic analysis were performed on ECC2783. Experiments assessing the conjugation and stability of plasmids carrying the carbapenemase gene were performed. We also performed a colistin resistance induction experiment and studied the fitness cost of transconjugants.Results: ECC2783 has an extensive drug resistance phenotype. Multilocus sequence typing analysis results showed that ECC2783 belongs to sequence type 93. Bioinformatics analysis confirmed that ECC2783 has four plasmids, of which pECC2783_a, carrying mcr-9, is the IncHI2 type, and pECC2783_c, carrying blaNDM-1, is the IncX3 type. pECC2783_d, carrying blaKPC-2, is an unclassified type. We successfully obtained two transconjugants (J53/ECC2783_1, carrying blaNDM-1, and J53/ECC2783_2, carrying blaKPC-2 and blaNDM-1 ). There was no statistically significant difference in the relative growth rate between J53 and J53/ECC2783_2.Conclusion: For the first time, we isolated carbapenem-resistant E. hormaechei plasmids co-harbouring blaNDM-1, blaKPC-2, and mcr-9 from a patient with a blood stream infection. This isolate has a survival advantage in a hospital environment, and its clinical monitoring should be strengthened.& COPY; 2023 The Authors. 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/ )
引用
收藏
页码:67 / 73
页数:7
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