Genome sequence of a sequence type 1 NDM-5-producing carbapenem-resistant Klebsiella pneumoniae in China

IF 3.7 3区 医学 Q2 INFECTIOUS DISEASES
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引用次数: 0

Abstract

Objectives

The emergence of carbapenem-resistant Klebsiella pneumoniae presents significant health challenges. Here, we present the structural genome sequence of an NDM-5–producing K. pneumoniae (HZKP2) in China.

Methods

Antimicrobial susceptibility tests were conducted via broth microdilution. Whole-genome sequencing was performed for genomic analysis. Wzi and capsular polysaccharide (KL) were analysed using Kaptive. Resistance genes, virulence factors, and comparative genomics analyses were also conducted. Multilocus sequence typing (MLST), replicons type, and core genome MLST analysis were further conducted using BacWGSTdb server.

Results

HZKP2 was resistant to cefepime, ceftazidime, ciprofloxacin, ciprofloxacin, meropenem, and ertapenem. It harboured fosA, blaSHV-187, oqxA, oqxB, sul1, dfrA1, tet(A), floR, aph(6)-Id, aph(3′')-Ib, sul2, blaCTX-M-55, and blaNDM-5. Based on the RAST results, 5563 genes that belonged to 398 subsystems were annotated. The complete genome sequence of HZKP2 was characterized as ST1, wzi 19, and KL19, 5 five contigs totalling 5 654 446 bp, including one chromosome and four plasmids. Further analysis found that blaNDM-5 was located in a 46 161 bp IncX3 plasmid (pHZKP2-3). The genetic structure of blaNDM-5 gene was ISKox3-IS26-bleMBL-blaNDM-5-IS5-ISAb125-IS3000. Further analysis revealed that insertion sequences mediated the dissemination of blaNDM-5 from other species of Enterobacterales. Phylogenetic analysis showed that the closest relative was from a human stool specimen in China, which differed by 53 core genome MLST alleles.

Conclusions

Our study provides the first structural perspective of the ST1 K. pneumoniae isolate producing NDM-5 in China. These results could provide valuable insights into the genetic characteristics, antimicrobial resistance mechanisms, and transmission dynamics of carbapenem-resistant K. pneumoniae in clinical settings.

中国产碳青霉烯类耐药肺炎克雷伯菌序列 1 型 NDM-5 的基因组序列。
目的:耐碳青霉烯类肺炎克雷伯氏菌(CRKP)的出现给健康带来了巨大挑战。在此,我们展示了中国产NDM-5肺炎克雷伯菌(HZKP2)的结构基因组序列:方法:通过肉汤微稀释法进行抗菌药敏感性试验。全基因组测序(WGS)用于基因组分析。用 Kaptive 对 Wzi 和胶囊多糖(KL)进行分析。还进行了抗性基因、毒力因子和比较基因组学分析。使用 BacWGSTdb 服务器进一步进行了多焦点序列分型(MLST)、复制子类型和核心基因组多焦点序列分型(cgMLST)分析:结果:HZKP2对头孢吡肟、头孢他啶、环丙沙星、环丙沙星、美罗培南和厄他培南耐药。它携带有 fosA、blaSHV-187、ocxA、ocxB、sul1、dfrA1、tet(A)、floR、ahph(6)-Id、ahph(3'')-Ib、sul2、blaCTX-M-55 和 blaNDM-5。根据 RAST 结果,对属于 398 个子系统的 5563 个基因进行了注释。HZKP2的完整基因组序列特征为ST1、wzi 19和KL19,共有5个等位组,总长度为5,654,446 bp,包括1条染色体和4个质粒。进一步分析发现,blaNDM-5 位于 46,161 bp IncX3 质粒(pHZKP2-3)中。blaNDM-5 基因的遗传结构为 ISKox3-IS26-bleMBL-blaNDM-5-IS5-ISAb125-IS3000 。进一步分析表明,插入序列介导了 blaNDM-5 从其他肠杆菌属物种的传播。系统发生学分析表明,与之最亲缘关系最近的是来自中国人类粪便标本的 blaNDM-5,两者之间存在 53 个 cgMLST 等位基因差异:结论:我们的研究首次从结构角度探讨了中国产生 NDM-5 的 ST1 型肺炎克雷伯菌分离株。结论:我们的研究首次从结构角度揭示了中国产生 NDM-5 的 ST1 型肺炎克雷伯菌分离株,这些结果可为了解 CRKP 的遗传特征、抗菌药耐药机制和在临床环境中的传播动态提供有价值的信息。
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来源期刊
Journal of global antimicrobial resistance
Journal of global antimicrobial resistance INFECTIOUS DISEASES-PHARMACOLOGY & PHARMACY
CiteScore
8.70
自引率
2.20%
发文量
285
审稿时长
34 weeks
期刊介绍: The Journal of Global Antimicrobial Resistance (JGAR) is a quarterly online journal run by an international Editorial Board that focuses on the global spread of antibiotic-resistant microbes. JGAR is a dedicated journal for all professionals working in research, health care, the environment and animal infection control, aiming to track the resistance threat worldwide and provides a single voice devoted to antimicrobial resistance (AMR). Featuring peer-reviewed and up to date research articles, reviews, short notes and hot topics JGAR covers the key topics related to antibacterial, antiviral, antifungal and antiparasitic resistance.
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