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High Prevalence of bla(NDM) Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China
The continuous emergence of carbapenem-resistant Escherichia coli (CRECO) presents a great challenge to public health. New Delhi metallo-lactamase (NDM) variants are widely disseminated in China, so the research on the prevalence and transmission of diverse bla(NDM) variants is urgently needed. In t...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6243109/ https://www.ncbi.nlm.nih.gov/pubmed/30483231 http://dx.doi.org/10.3389/fmicb.2018.02704 |
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author | Bi, Ruru Kong, Ziyan Qian, Huimin Jiang, Fei Kang, Haiquan Gu, Bing Ma, Ping |
author_facet | Bi, Ruru Kong, Ziyan Qian, Huimin Jiang, Fei Kang, Haiquan Gu, Bing Ma, Ping |
author_sort | Bi, Ruru |
collection | PubMed |
description | The continuous emergence of carbapenem-resistant Escherichia coli (CRECO) presents a great challenge to public health. New Delhi metallo-lactamase (NDM) variants are widely disseminated in China, so the research on the prevalence and transmission of diverse bla(NDM) variants is urgently needed. In the present study, 54 CRECO isolates were collected from 1,185 Escherichia coli isolates in five hospitals in Northern Jiangsu Province, China from September 2015 to August 2016. Antimicrobial susceptibility tests, PCR detection of resistance determinants, multi-locus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE) were performed to characterize these strains. Plasmid conjugation experiments were carried out to determine the transferability of resistant genes from selected isolates. PCR-based replicon typing (PBRT), S1 nuclease-PFGE, and Southern blotting were conducted for plasmid profiling. Carbapenemase genes were detectable in all CRECO isolates, among which thirty-one CRECO isolates were found to carry bla(NDM−5) (54.7%), while, bla(NDM−1), bla(NDM−7), bla(NDM−4), bla(NDM−9), and bla(KPC−2) were identified in 14, five, two, one, and one isolates, respectively. MLST results revealed 15 different STs and four new STs were first reported to be linked with NDM-producing isolates. PFGE typing showed that no more than two isolates with the same ST appeared to the same band pattern except three ST410 isolates. Twenty-six selected NDM-producing isolates were successfully transferred to E. coli J53 by conjugation experiments. Notably, 50.0% (13/26) of bla(NDM) variants were found to be carried by ~55 kb IncX3 plasmid. Our study reported a high prevalence of bla(NDM) variants, especially bla(NDM−5), in Northern Jiangsu province, China. Diverse bla(NDM) variants were mainly carried by ~55 kb IncX3 plasmids, suggesting that the fast evolution and high transferability of this kind of plasmid promote the high prevalence of bla(NDM) variants. Therefore, large-scale surveillance and effective infection control measures are also urgently needed to prevent diverse bla(NDM) variants from becoming epidemic in the future. |
format | Online Article Text |
id | pubmed-6243109 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-62431092018-11-27 High Prevalence of bla(NDM) Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China Bi, Ruru Kong, Ziyan Qian, Huimin Jiang, Fei Kang, Haiquan Gu, Bing Ma, Ping Front Microbiol Microbiology The continuous emergence of carbapenem-resistant Escherichia coli (CRECO) presents a great challenge to public health. New Delhi metallo-lactamase (NDM) variants are widely disseminated in China, so the research on the prevalence and transmission of diverse bla(NDM) variants is urgently needed. In the present study, 54 CRECO isolates were collected from 1,185 Escherichia coli isolates in five hospitals in Northern Jiangsu Province, China from September 2015 to August 2016. Antimicrobial susceptibility tests, PCR detection of resistance determinants, multi-locus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE) were performed to characterize these strains. Plasmid conjugation experiments were carried out to determine the transferability of resistant genes from selected isolates. PCR-based replicon typing (PBRT), S1 nuclease-PFGE, and Southern blotting were conducted for plasmid profiling. Carbapenemase genes were detectable in all CRECO isolates, among which thirty-one CRECO isolates were found to carry bla(NDM−5) (54.7%), while, bla(NDM−1), bla(NDM−7), bla(NDM−4), bla(NDM−9), and bla(KPC−2) were identified in 14, five, two, one, and one isolates, respectively. MLST results revealed 15 different STs and four new STs were first reported to be linked with NDM-producing isolates. PFGE typing showed that no more than two isolates with the same ST appeared to the same band pattern except three ST410 isolates. Twenty-six selected NDM-producing isolates were successfully transferred to E. coli J53 by conjugation experiments. Notably, 50.0% (13/26) of bla(NDM) variants were found to be carried by ~55 kb IncX3 plasmid. Our study reported a high prevalence of bla(NDM) variants, especially bla(NDM−5), in Northern Jiangsu province, China. Diverse bla(NDM) variants were mainly carried by ~55 kb IncX3 plasmids, suggesting that the fast evolution and high transferability of this kind of plasmid promote the high prevalence of bla(NDM) variants. Therefore, large-scale surveillance and effective infection control measures are also urgently needed to prevent diverse bla(NDM) variants from becoming epidemic in the future. Frontiers Media S.A. 2018-11-13 /pmc/articles/PMC6243109/ /pubmed/30483231 http://dx.doi.org/10.3389/fmicb.2018.02704 Text en Copyright © 2018 Bi, Kong, Qian, Jiang, Kang, Gu and Ma. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Microbiology Bi, Ruru Kong, Ziyan Qian, Huimin Jiang, Fei Kang, Haiquan Gu, Bing Ma, Ping High Prevalence of bla(NDM) Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China |
title | High Prevalence of bla(NDM) Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China |
title_full | High Prevalence of bla(NDM) Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China |
title_fullStr | High Prevalence of bla(NDM) Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China |
title_full_unstemmed | High Prevalence of bla(NDM) Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China |
title_short | High Prevalence of bla(NDM) Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China |
title_sort | high prevalence of bla(ndm) variants among carbapenem-resistant escherichia coli in northern jiangsu province, china |
topic | Microbiology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6243109/ https://www.ncbi.nlm.nih.gov/pubmed/30483231 http://dx.doi.org/10.3389/fmicb.2018.02704 |
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