New sequence type in multidrug-resistant Klebsiella pneumoniae harboring the blaNDM-1-encoding gene in Brazil
Objectives: The aim of this study was to investigate the blaNDM gene, pathogenic potential, and antimicrobial resistance of clinical isolates of carbapenem-resistant Klebsiella pneumoniae isolated from patients admitted to the University Hospital of Londrina between January 2014 and March 2017. Meth...
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Format: | Article |
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Elsevier
2019-02-01
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Series: | International Journal of Infectious Diseases |
Online Access: | http://www.sciencedirect.com/science/article/pii/S1201971218345910 |
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author | Roseane Galdioli Nava Mariana Oliveira-Silva Rafael Nakamura-Silva André Pitondo-Silva Eliana Carolina Vespero |
author_facet | Roseane Galdioli Nava Mariana Oliveira-Silva Rafael Nakamura-Silva André Pitondo-Silva Eliana Carolina Vespero |
author_sort | Roseane Galdioli Nava |
collection | DOAJ |
description | Objectives: The aim of this study was to investigate the blaNDM gene, pathogenic potential, and antimicrobial resistance of clinical isolates of carbapenem-resistant Klebsiella pneumoniae isolated from patients admitted to the University Hospital of Londrina between January 2014 and March 2017. Methods: blaNDM-1 and virulence genes were investigated using conventional PCR methods Antimicrobial susceptibility testing was performed by disk diffusion method according to the Clinical and Laboratory Standards Institute guidelines of 2017. Clonal relationships of the New Delhi metallo-β-lactamase (NDM)-positive isolates were determined by enterobacterial repetitive intergenic consensus (ERIC)-PCR and multilocus sequence typing (MLST). Results: A total of 825 K. pneumoniae were identified, with four isolates (Kp6408, Kp6410, Kp6411, and Kp6715) presenting the blaNDM-1 gene. All NDM-1-producing isolates showed co-production of blaKPC-2 and blaTEM genes and also the virulence genes kfu, entB, mrkD, and fimH. Three isolates (Kp6408, Kp6410, and Kp6715) were classified as multidrug-resistant (MDR) and one (Kp6411) as extensively drug-resistant (XDR). ERIC-PCR analyses demonstrated that the isolates shared about 60% genetic similarity. MLST revealed four different sequence types (STs), described for the first time in Brazil, with two novel STs described in this study: ST3371 and ST3372. Conclusion: This study reports the identification of NDM-1 associated with KPC and virulence genes in four MDR K. pneumoniae with STs first described in Brazil. Keywords: MLST, Carbapenemases, Klebsiella pneumoniae, NDM |
first_indexed | 2024-12-13T01:53:13Z |
format | Article |
id | doaj.art-6a47e904daf84ff4ac6328560c7aa302 |
institution | Directory Open Access Journal |
issn | 1201-9712 |
language | English |
last_indexed | 2024-12-13T01:53:13Z |
publishDate | 2019-02-01 |
publisher | Elsevier |
record_format | Article |
series | International Journal of Infectious Diseases |
spelling | doaj.art-6a47e904daf84ff4ac6328560c7aa3022022-12-22T00:03:28ZengElsevierInternational Journal of Infectious Diseases1201-97122019-02-0179101103New sequence type in multidrug-resistant Klebsiella pneumoniae harboring the blaNDM-1-encoding gene in BrazilRoseane Galdioli Nava0Mariana Oliveira-Silva1Rafael Nakamura-Silva2André Pitondo-Silva3Eliana Carolina Vespero4Department of Pathology, Clinical and Toxicological Analysis, State University of Londrina, Londrina, Paraná, BrazilSchool of Dentistry, University of Ribeirão Preto, Ribeirão Preto, São Paulo, BrazilSchool of Dentistry, University of Ribeirão Preto, Ribeirão Preto, São Paulo, BrazilSchool of Dentistry, University of Ribeirão Preto, Ribeirão Preto, São Paulo, BrazilDepartment of Pathology, Clinical and Toxicological Analysis, State University of Londrina, Londrina, Paraná, Brazil; Corresponding author.Objectives: The aim of this study was to investigate the blaNDM gene, pathogenic potential, and antimicrobial resistance of clinical isolates of carbapenem-resistant Klebsiella pneumoniae isolated from patients admitted to the University Hospital of Londrina between January 2014 and March 2017. Methods: blaNDM-1 and virulence genes were investigated using conventional PCR methods Antimicrobial susceptibility testing was performed by disk diffusion method according to the Clinical and Laboratory Standards Institute guidelines of 2017. Clonal relationships of the New Delhi metallo-β-lactamase (NDM)-positive isolates were determined by enterobacterial repetitive intergenic consensus (ERIC)-PCR and multilocus sequence typing (MLST). Results: A total of 825 K. pneumoniae were identified, with four isolates (Kp6408, Kp6410, Kp6411, and Kp6715) presenting the blaNDM-1 gene. All NDM-1-producing isolates showed co-production of blaKPC-2 and blaTEM genes and also the virulence genes kfu, entB, mrkD, and fimH. Three isolates (Kp6408, Kp6410, and Kp6715) were classified as multidrug-resistant (MDR) and one (Kp6411) as extensively drug-resistant (XDR). ERIC-PCR analyses demonstrated that the isolates shared about 60% genetic similarity. MLST revealed four different sequence types (STs), described for the first time in Brazil, with two novel STs described in this study: ST3371 and ST3372. Conclusion: This study reports the identification of NDM-1 associated with KPC and virulence genes in four MDR K. pneumoniae with STs first described in Brazil. Keywords: MLST, Carbapenemases, Klebsiella pneumoniae, NDMhttp://www.sciencedirect.com/science/article/pii/S1201971218345910 |
spellingShingle | Roseane Galdioli Nava Mariana Oliveira-Silva Rafael Nakamura-Silva André Pitondo-Silva Eliana Carolina Vespero New sequence type in multidrug-resistant Klebsiella pneumoniae harboring the blaNDM-1-encoding gene in Brazil International Journal of Infectious Diseases |
title | New sequence type in multidrug-resistant Klebsiella pneumoniae harboring the blaNDM-1-encoding gene in Brazil |
title_full | New sequence type in multidrug-resistant Klebsiella pneumoniae harboring the blaNDM-1-encoding gene in Brazil |
title_fullStr | New sequence type in multidrug-resistant Klebsiella pneumoniae harboring the blaNDM-1-encoding gene in Brazil |
title_full_unstemmed | New sequence type in multidrug-resistant Klebsiella pneumoniae harboring the blaNDM-1-encoding gene in Brazil |
title_short | New sequence type in multidrug-resistant Klebsiella pneumoniae harboring the blaNDM-1-encoding gene in Brazil |
title_sort | new sequence type in multidrug resistant klebsiella pneumoniae harboring the blandm 1 encoding gene in brazil |
url | http://www.sciencedirect.com/science/article/pii/S1201971218345910 |
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