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Sriram KK, Ekedahl E, Hoang NTB, Sewunet T, Berglund B, Lundberg L, Nematzadeh S, Nilsson M, Nilsson LE, Le NK, Tran DM, Hanberger H, Olson L, Larsson M, Giske CG, Westerlund F. High diversity of bla NDM-1-encoding plasmids in Klebsiella pneumoniae isolated from neonates in a Vietnamese hospital. Int J Antimicrob Agents 2021; 59:106496. [PMID: 34921976 DOI: 10.1016/j.ijantimicag.2021.106496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 09/08/2021] [Accepted: 12/01/2021] [Indexed: 11/24/2022]
Abstract
OBJECTIVES The carbapenemase-encoding gene blaNDM-1 has been reported in Vietnam over the last ten years, and blaNDM-producing Enterobacteriaceae are now silently and rapidly spreading. A key factor behind dissemination of blaNDM-1 are plasmids, mobile genetic elements that commonly carry antibiotic resistance genes and spread via conjugation. Here, we characterized the diversity of blaNDM-1-encoding plasmids from neonates at a large Vietnamese hospital . METHODS 18 fecal Klebsiella pneumoniae and Klebsiella quasipneumoniae isolates collected from 16 neonates at a large pediatric hospital in Vietnam were studied with optical DNA mapping (ODM) and next-generation sequencing (NGS). We identified the plasmid(s) carrying blaNDM-1 by combining ODM with Cas9 restriction. By comparing the plasmids between isolates, we could investigate if the same plasmid was present in different patients. RESULTS Although the same plasmid was found among some isolates, ODM confirmed that there were at least 10 different plasmids encoding blaNDM-1 among the 18 isolates collected from 16 neonates, suggesting a large plasmid diversity. The ODM results were in large agreement with the NGS data. Interestingly, some isolates had two distinct plasmids encoding blaNDM-1, which could be readily detected with ODM. Thus far, the coexistence of different plasmids carrying the same carbapenem resistance gene in an isolate encoding blaNDM-1 has rarely been reported, likely due to limitations in existing plasmid characterization techniques. CONCLUSIONS Our results show that the plasmids encoding blaNDM-1 in this cohort were very diverse, suggesting a similar picture in the Vietnamese society. The study also highlights important aspects of the usefulness of ODM for plasmid analysis.
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Affiliation(s)
- K K Sriram
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Elina Ekedahl
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Ngoc Thi Bich Hoang
- Department of Microbiology, Vietnam National Children's Hospital, Hanoi, Vietnam
| | - Tsegaye Sewunet
- Division of Clinical Microbiology, Department of Laboratory medicine, Karolinska Institutet, Stockholm, Sweden
| | - Björn Berglund
- Department of Biomedical and Clinical Sciences, Faculty of medicine, Linköping University, Linköping, Sweden
| | - Ludwig Lundberg
- Department of Biomedical and Clinical Sciences, Faculty of medicine, Linköping University, Linköping, Sweden; Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Shoeib Nematzadeh
- Division of Clinical Microbiology, Department of Laboratory medicine, Karolinska Institutet, Stockholm, Sweden
| | - Maud Nilsson
- Department of Biomedical and Clinical Sciences, Faculty of medicine, Linköping University, Linköping, Sweden
| | - Lennart E Nilsson
- Department of Biomedical and Clinical Sciences, Faculty of medicine, Linköping University, Linköping, Sweden
| | - Ngai Kien Le
- Department of Surgery, Vietnam National Children's Hospital, Hanoi, Vietnam
| | - Dien Minh Tran
- Department of Infection Control, Vietnam National Children's Hospital, Hanoi, Vietnam
| | - Håkan Hanberger
- Department of Biomedical and Clinical Sciences, Faculty of medicine, Linköping University, Linköping, Sweden
| | - Linus Olson
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden; Department of Women and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - Mattias Larsson
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Christian G Giske
- Division of Clinical Microbiology, Department of Laboratory medicine, Karolinska Institutet, Stockholm, Sweden; Clinical microbiology, Karolinska University Hospital, Stockholm, Sweden
| | - Fredrik Westerlund
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
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Ferreira C, Bogas D, Bikarolla SK, Varela AR, Frykholm K, Linheiro R, Nunes OC, Westerlund F, Manaia CM. Genetic variation in the conjugative plasmidome of a hospital effluent multidrug resistant Escherichia coli strain. Chemosphere 2019; 220:748-759. [PMID: 30611073 DOI: 10.1016/j.chemosphere.2018.12.130] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 11/23/2018] [Accepted: 12/18/2018] [Indexed: 06/09/2023]
Abstract
Bacteria harboring conjugative plasmids have the potential for spreading antibiotic resistance through horizontal gene transfer. It is described that the selection and dissemination of antibiotic resistance is enhanced by stressors, like metals or antibiotics, which can occur as environmental contaminants. This study aimed at unveiling the composition of the conjugative plasmidome of a hospital effluent multidrug resistant Escherichia coli strain (H1FC54) under different mating conditions. To meet this objective, plasmid pulsed field gel electrophoresis, optical mapping analyses and DNA sequencing were used in combination with phenotype analysis. Strain H1FC54 was observed to harbor five plasmids, three of which were conjugative and two of these, pH1FC54_330 and pH1FC54_140, contained metal and antibiotic resistance genes. Transconjugants obtained in the absence or presence of tellurite (0.5 μM or 5 μM), arsenite (0.5 μM, 5 μM or 15 μM) or ceftazidime (10 mg/L) and selected in the presence of sodium azide (100 mg/L) and tetracycline (16 mg/L) presented distinct phenotypes, associated with the acquisition of different plasmid combinations, including two co-integrate plasmids, of 310 kbp and 517 kbp. The variable composition of the conjugative plasmidome, the formation of co-integrates during conjugation, as well as the transfer of non-transferable plasmids via co-integration, and the possible association between antibiotic, arsenite and tellurite tolerance was demonstrated. These evidences bring interesting insights into the comprehension of the molecular and physiological mechanisms that underlie antibiotic resistance propagation in the environment.
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Affiliation(s)
- Catarina Ferreira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374, Porto, Portugal
| | - Diana Bogas
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374, Porto, Portugal
| | - Santosh K Bikarolla
- Division of Chemical Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivagen 10, SE-412 96, Gothenburg, Sweden
| | - Ana Rita Varela
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374, Porto, Portugal; LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Karolin Frykholm
- Division of Chemical Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivagen 10, SE-412 96, Gothenburg, Sweden
| | - Raquel Linheiro
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374, Porto, Portugal
| | - Olga C Nunes
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Fredrik Westerlund
- Division of Chemical Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Kemivagen 10, SE-412 96, Gothenburg, Sweden
| | - Célia M Manaia
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, 172, 4200-374, Porto, Portugal.
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Lindblom A, Kk S, Müller V, Öz R, Sandström H, Åhrén C, Westerlund F, Karami N. Interspecies plasmid transfer appears rare in sequential infections with extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae. Diagn Microbiol Infect Dis 2019; 93:380-5. [PMID: 30527621 DOI: 10.1016/j.diagmicrobio.2018.10.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/29/2018] [Accepted: 10/24/2018] [Indexed: 02/08/2023]
Abstract
From a cohort of 1836 Swedish patients infected with ESBL-producing Enterobacteriaceae (EPE) during 2004-2014, 513 patients with recurrent EPE infection were identified. Only in 14 of the 513 patients was a change of species (ESBL-E. coli to ESBL-K. pneumoniae or vice versa) found between the index and subsequent infection. Eleven sequential urine isolates from 5 of the 14 patients were available for further analysis of possible transfer of ESBL-carrying plasmids. The plasmid content was studied using optical DNA mapping (ODM), PCR-based replicon typing, and ESBL gene sequencing. ODM allowed us to directly compare whole plasmids between isolates and found similar ESBL-carrying plasmids in 3 out of the 5 patients. The ODM results and the rarity in shift of species between ESBL-E. coli and ESBL-K. pneumoniae imply that in recurrent EPE infections interspecies plasmid transfer is uncommon.
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