Characterization of the novel In1059 harbouring VIM gene cassette
Abstract Background VIM-type enzyme encodes the most widely acquired metallo-β-lactamases in Gram- negative bacteria. To obtain current epidemiological data for integrons from enterobacteriae in hospital, the study characterizes the genetic structure in In1059 by comparison with In846 integrons harb...
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doaj-1575fe197a964986823a19dda4e08a772020-11-24T21:22:13ZengBMCAntimicrobial Resistance and Infection Control2047-29942017-05-01611910.1186/s13756-017-0204-1Characterization of the novel In1059 harbouring VIM gene cassetteDongguo Wang0Jinhong Yang1Meiyu Fang2Wei He3Ying Zhang4Caixia Liu5Dongsheng Zhou6Department of Clinical Laboratory Medicine, Taizhou Municipal Hospital affiliated with Taizhou University and the Institute of Molecular Diagnostics of Taizhou UniversityDepartment of Clinical Laboratory Medicine, the Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical UniversityDepartment of Clinical Laboratory Medicine, Hangzhou First People’s Hospital of Nanjing Medical UniversityDepartment of Clinical Laboratory Medicine, Wenzhou Hospital of Integrated Traditional Chinese and Western MedicineDepartment of Clinical Laboratory Medicine, Wenzhou Hospital of Integrated Traditional Chinese and Western MedicineDepartment of Clinical Laboratory Medicine, the Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical UniversityDepartment of Clinical Laboratory Medicine, Taizhou Municipal Hospital affiliated with Taizhou University and the Institute of Molecular Diagnostics of Taizhou UniversityAbstract Background VIM-type enzyme encodes the most widely acquired metallo-β-lactamases in Gram- negative bacteria. To obtain current epidemiological data for integrons from enterobacteriae in hospital, the study characterizes the genetic structure in In1059 by comparison with In846 integrons harbouring VIM gene and other class 1 integrons including In37, In62, In843 and In1021 with the aim of identifying the putative mechanisms involved integron mobilization and infer evolution of relevant integrons. Methods Six of 69 recombinant plasmids from clinical strains were found to be class 1 integrons by digestion with BamHI, drug susceptibility testing, conjugation experiments, PCR amplification, integron cloning and sequencing, genome comparison, and detection of carbapenemase activity. Results The sequences of the six recombinant plasmids encoding In1021, In843, In846, In37, In62, and the novel In1059 integron had approximate lengths of ~4.8-, 4.1-, 5.1-, 5.3-, 5.3- and 6.6- kb, respectively. The genetic structures of these integrons were mapped and characterized, and the carbapenemase activities of their parental strains were assessed. Conclusions Our results suggest that the six variable integron structures and regular variations that exist in the gene cassettes provide a putative mechanism for the integron changes. Our study has also shown that the genetic features in the integrons named above fall within a scheme involving the stepwise and parallel evolution of class 1 integron variation likely under antibiotic selection pressure in clinical settings.http://link.springer.com/article/10.1186/s13756-017-0204-1Novel integronIn1059Plasmid digestionCloningMobilization inferenceEvolution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Dongguo Wang Jinhong Yang Meiyu Fang Wei He Ying Zhang Caixia Liu Dongsheng Zhou |
spellingShingle |
Dongguo Wang Jinhong Yang Meiyu Fang Wei He Ying Zhang Caixia Liu Dongsheng Zhou Characterization of the novel In1059 harbouring VIM gene cassette Antimicrobial Resistance and Infection Control Novel integron In1059 Plasmid digestion Cloning Mobilization inference Evolution |
author_facet |
Dongguo Wang Jinhong Yang Meiyu Fang Wei He Ying Zhang Caixia Liu Dongsheng Zhou |
author_sort |
Dongguo Wang |
title |
Characterization of the novel In1059 harbouring VIM gene cassette |
title_short |
Characterization of the novel In1059 harbouring VIM gene cassette |
title_full |
Characterization of the novel In1059 harbouring VIM gene cassette |
title_fullStr |
Characterization of the novel In1059 harbouring VIM gene cassette |
title_full_unstemmed |
Characterization of the novel In1059 harbouring VIM gene cassette |
title_sort |
characterization of the novel in1059 harbouring vim gene cassette |
publisher |
BMC |
series |
Antimicrobial Resistance and Infection Control |
issn |
2047-2994 |
publishDate |
2017-05-01 |
description |
Abstract Background VIM-type enzyme encodes the most widely acquired metallo-β-lactamases in Gram- negative bacteria. To obtain current epidemiological data for integrons from enterobacteriae in hospital, the study characterizes the genetic structure in In1059 by comparison with In846 integrons harbouring VIM gene and other class 1 integrons including In37, In62, In843 and In1021 with the aim of identifying the putative mechanisms involved integron mobilization and infer evolution of relevant integrons. Methods Six of 69 recombinant plasmids from clinical strains were found to be class 1 integrons by digestion with BamHI, drug susceptibility testing, conjugation experiments, PCR amplification, integron cloning and sequencing, genome comparison, and detection of carbapenemase activity. Results The sequences of the six recombinant plasmids encoding In1021, In843, In846, In37, In62, and the novel In1059 integron had approximate lengths of ~4.8-, 4.1-, 5.1-, 5.3-, 5.3- and 6.6- kb, respectively. The genetic structures of these integrons were mapped and characterized, and the carbapenemase activities of their parental strains were assessed. Conclusions Our results suggest that the six variable integron structures and regular variations that exist in the gene cassettes provide a putative mechanism for the integron changes. Our study has also shown that the genetic features in the integrons named above fall within a scheme involving the stepwise and parallel evolution of class 1 integron variation likely under antibiotic selection pressure in clinical settings. |
topic |
Novel integron In1059 Plasmid digestion Cloning Mobilization inference Evolution |
url |
http://link.springer.com/article/10.1186/s13756-017-0204-1 |
work_keys_str_mv |
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1725996837808111616 |