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Plasmid-Mediated Quinolone Resistance (PMQR) in Two Clinical Strains of Salmonella enterica Serovar Corvallis

Non-typhoid serovars of Salmonella enterica are one of the main causes of bacterial food-borne infections worldwide. For the treatment of severe cases of salmonellosis in adults, fluoroquinolones are amongst the drugs of choice. They are categorized by the World Health Organization (WHO) as “critica...

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Autores principales: Vázquez, Xenia, Fernández, Javier, Hernáez, Silvia, Rodicio, Rosaura, Rodicio, Maria Rosario
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8953408/
https://www.ncbi.nlm.nih.gov/pubmed/35336154
http://dx.doi.org/10.3390/microorganisms10030579
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author Vázquez, Xenia
Fernández, Javier
Hernáez, Silvia
Rodicio, Rosaura
Rodicio, Maria Rosario
author_facet Vázquez, Xenia
Fernández, Javier
Hernáez, Silvia
Rodicio, Rosaura
Rodicio, Maria Rosario
author_sort Vázquez, Xenia
collection PubMed
description Non-typhoid serovars of Salmonella enterica are one of the main causes of bacterial food-borne infections worldwide. For the treatment of severe cases of salmonellosis in adults, fluoroquinolones are amongst the drugs of choice. They are categorized by the World Health Organization (WHO) as “critically important with highest priority in human medicine”. In the present study, two clinical S. enterica serovar Corvallis isolates (HUA 5/18 and HUA 6/18) from a Spanish hospital, selected on the basis of fluoroquinolone resistance, were characterized. The MICs of ciprofloxacin, determined by E-test, were 0.5 and 0.75 µg/mL for HUA 5/18 and HUA 6/18, respectively, and both were also resistant to pefloxacin but susceptible to nalidixic acid. Whole genome sequencing (WGS) of the isolates was performed with Illumina platform, and different bioinformatics tools were used for sequence analysis. The two isolates belonged to ST1541, and had the Thr57Ser substitution in the ParC protein which is also found in ciprofloxacin susceptible isolates. However, they harbored identical ColE plasmids of 10 kb carrying the qnrS1 gene. In these plasmids, the gene was flanked by defective versions of IS2-like and ISKra4-like insertion sequences. HUA 5/18 and HUA 6/18 were also phenotypically resistant to streptomycin, sulfonamides and tetracycline, with the responsible genes: strA, strB, sul2 and tet(A) genes, being located on a IncQ1 plasmid. ColE plasmids with the qnrS1 gene are widely spread among multiple serovars of S. enterica from different samples and countries. These mobilizable plasmids are playing an important role in the worldwide spread of qnrS1. Thus, their detection in hospitals is a cause of concern which deserves further attention.
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spelling pubmed-89534082022-03-26 Plasmid-Mediated Quinolone Resistance (PMQR) in Two Clinical Strains of Salmonella enterica Serovar Corvallis Vázquez, Xenia Fernández, Javier Hernáez, Silvia Rodicio, Rosaura Rodicio, Maria Rosario Microorganisms Article Non-typhoid serovars of Salmonella enterica are one of the main causes of bacterial food-borne infections worldwide. For the treatment of severe cases of salmonellosis in adults, fluoroquinolones are amongst the drugs of choice. They are categorized by the World Health Organization (WHO) as “critically important with highest priority in human medicine”. In the present study, two clinical S. enterica serovar Corvallis isolates (HUA 5/18 and HUA 6/18) from a Spanish hospital, selected on the basis of fluoroquinolone resistance, were characterized. The MICs of ciprofloxacin, determined by E-test, were 0.5 and 0.75 µg/mL for HUA 5/18 and HUA 6/18, respectively, and both were also resistant to pefloxacin but susceptible to nalidixic acid. Whole genome sequencing (WGS) of the isolates was performed with Illumina platform, and different bioinformatics tools were used for sequence analysis. The two isolates belonged to ST1541, and had the Thr57Ser substitution in the ParC protein which is also found in ciprofloxacin susceptible isolates. However, they harbored identical ColE plasmids of 10 kb carrying the qnrS1 gene. In these plasmids, the gene was flanked by defective versions of IS2-like and ISKra4-like insertion sequences. HUA 5/18 and HUA 6/18 were also phenotypically resistant to streptomycin, sulfonamides and tetracycline, with the responsible genes: strA, strB, sul2 and tet(A) genes, being located on a IncQ1 plasmid. ColE plasmids with the qnrS1 gene are widely spread among multiple serovars of S. enterica from different samples and countries. These mobilizable plasmids are playing an important role in the worldwide spread of qnrS1. Thus, their detection in hospitals is a cause of concern which deserves further attention. MDPI 2022-03-07 /pmc/articles/PMC8953408/ /pubmed/35336154 http://dx.doi.org/10.3390/microorganisms10030579 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vázquez, Xenia
Fernández, Javier
Hernáez, Silvia
Rodicio, Rosaura
Rodicio, Maria Rosario
Plasmid-Mediated Quinolone Resistance (PMQR) in Two Clinical Strains of Salmonella enterica Serovar Corvallis
title Plasmid-Mediated Quinolone Resistance (PMQR) in Two Clinical Strains of Salmonella enterica Serovar Corvallis
title_full Plasmid-Mediated Quinolone Resistance (PMQR) in Two Clinical Strains of Salmonella enterica Serovar Corvallis
title_fullStr Plasmid-Mediated Quinolone Resistance (PMQR) in Two Clinical Strains of Salmonella enterica Serovar Corvallis
title_full_unstemmed Plasmid-Mediated Quinolone Resistance (PMQR) in Two Clinical Strains of Salmonella enterica Serovar Corvallis
title_short Plasmid-Mediated Quinolone Resistance (PMQR) in Two Clinical Strains of Salmonella enterica Serovar Corvallis
title_sort plasmid-mediated quinolone resistance (pmqr) in two clinical strains of salmonella enterica serovar corvallis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8953408/
https://www.ncbi.nlm.nih.gov/pubmed/35336154
http://dx.doi.org/10.3390/microorganisms10030579
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