Scholarlink

Background <p>In recent years, the detection of <i>Klebsiella pneumoniae</i> (KLPN) producing New Delhi metallo-β-lactamase (NDM), particularly NDM-1, has increased in Germany. Plasmids play a crucial role in the dissemination of NDM-1, facilitating its persistence in both clinical and environmental reservoirs. Between 2021 and 2024, a substantial number of NDM-1-producing KLPN isolates were detected across multiple hospital sites in Berlin. This study aimed to investigate a potential multi-site outbreak involving NDM-1-producing KLPN, and to assess the role of clonal versus plasmid-mediated dissemination.</p> Methods <p>We performed short-read sequencing for all isolates, complemented by long-read sequencing for a subset (Illumina and Oxford Nanopore Technologies). Core genome multi locus sequence typing (cgMLST) was conducted using SeqSphere+. NDM-1 plasmids were characterized with the MOB-suite tools. Reference plasmids were reconstructed from hybrid assemblies using TaDReP. Short-read sequences from all isolates were aligned against these reference plasmids to assess genetic relatedness.</p> Results <p>Analysis of 57 NDM-1 plasmid carrying KLPN isolates at the clonal level revealed three distinct outbreak clusters (O1-O3). These corresponded to three unique NDM-1 reference plasmids: p1 (54.0&#xa0;kb IncFIB(pQil)), p2 (54.3&#xa0;kb IncR), and p3 (355.5&#xa0;kb; no Inc type specified). Plasmid clustering from short-reads was consistent with the clonal clusters.</p> Conclusions <p>Both plasmid-level analysis and cgMLST yielded congruent results, effectively ruling out the possibility of multi-site, plasmid-mediated NDM-1 transmission. The detection of a globally disseminated NDM-1 plasmid within one of the clonal clusters highlights its potential role in the spread of resistance during the recent surge of NDM-1 carrying KLPN isolates in Germany.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

NDM-1 plasmid clustering reflects clonal transmission of Klebsiella pneumoniae ST147 in four hospitals in Berlin, Germany

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年10月2日

查看全文
  • Anna Weber,
  • Luisa Denkel,
  • Christine Geffers,
  • Axel Kola,
  • Friederike Maechler

摘要

Background

In recent years, the detection of Klebsiella pneumoniae (KLPN) producing New Delhi metallo-β-lactamase (NDM), particularly NDM-1, has increased in Germany. Plasmids play a crucial role in the dissemination of NDM-1, facilitating its persistence in both clinical and environmental reservoirs. Between 2021 and 2024, a substantial number of NDM-1-producing KLPN isolates were detected across multiple hospital sites in Berlin. This study aimed to investigate a potential multi-site outbreak involving NDM-1-producing KLPN, and to assess the role of clonal versus plasmid-mediated dissemination.

Methods

We performed short-read sequencing for all isolates, complemented by long-read sequencing for a subset (Illumina and Oxford Nanopore Technologies). Core genome multi locus sequence typing (cgMLST) was conducted using SeqSphere+. NDM-1 plasmids were characterized with the MOB-suite tools. Reference plasmids were reconstructed from hybrid assemblies using TaDReP. Short-read sequences from all isolates were aligned against these reference plasmids to assess genetic relatedness.

Results

Analysis of 57 NDM-1 plasmid carrying KLPN isolates at the clonal level revealed three distinct outbreak clusters (O1-O3). These corresponded to three unique NDM-1 reference plasmids: p1 (54.0 kb IncFIB(pQil)), p2 (54.3 kb IncR), and p3 (355.5 kb; no Inc type specified). Plasmid clustering from short-reads was consistent with the clonal clusters.

Conclusions

Both plasmid-level analysis and cgMLST yielded congruent results, effectively ruling out the possibility of multi-site, plasmid-mediated NDM-1 transmission. The detection of a globally disseminated NDM-1 plasmid within one of the clonal clusters highlights its potential role in the spread of resistance during the recent surge of NDM-1 carrying KLPN isolates in Germany.