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  A multiplex single nucleotide polymorphism typing assay for detecting mutations that result in decreased fluoroquinolone susceptibility in Salmonella enterica serovars Typhi and Paratyphi A

Song, Y., Roumagnac, P., Weill, F.-X., Wain, J., Dolecek, C., Mazzoni, C. J., et al. (2010). A multiplex single nucleotide polymorphism typing assay for detecting mutations that result in decreased fluoroquinolone susceptibility in Salmonella enterica serovars Typhi and Paratyphi A. Journal of Antimicrobial Chemotherapy, 65(8), 1631-1641.

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Genre: Zeitschriftenartikel
Alternativer Titel : J. Antimicrob. Chemother.

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J_Antimicrob_Chemother_2010_65_1631.pdf (Verlagsversion), 432KB
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© The Author 2010. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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 Urheber:
Song, Yajun, Autor
Roumagnac, Philippe1, Autor           
Weill, François-Xavier, Autor
Wain, John, Autor
Dolecek, Christiane, Autor
Mazzoni, Camila J.1, Autor           
Holt, Kathryn E., Autor
Achtman, Mark1, Autor           
Affiliations:
1Department of Molecular Biology, Max Planck Institute for Infection Biology, Max Planck Society, ou_1664147              

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Schlagwörter: genotyping; DNA gyrase; mechanisms of resistance; Salmonella
 Zusammenfassung: Decreased susceptibility to fluoroquinolones has become a major problem for the successful therapy of human infections caused by Salmonella enterica, especially the life-threatening typhoid and paratyphoid fevers. By using Luminex xTAG beads, we developed a rapid, reliable and cost-effective multiplexed genotyping assay for simultaneously detecting 11 mutations in gyrA, gyrB and parE of S. enterica serovars Typhi and Paratyphi A that result in nalidixic acid resistance (Nal(R)) and/or decreased susceptibility to fluoroquinolones. This assay yielded unambiguous single nucleotide polymorphism calls on extracted DNA from 292 isolates of Salmonella Typhi (Nal(R) = 223 and Nal(S) = 69) and 106 isolates of Salmonella Paratyphi A (Nal(R) = 24 and Nal(S) = 82). All of the 247 Nal(R) Salmonella Typhi and Salmonella Paratyphi A isolates were found to harbour at least one of the target mutations, with GyrA Phe-83 as the most common one (143/223 for Salmonella Typhi and 18/24 for Salmonella Paratyphi A). We also identified three GyrB mutations in eight Nal(S) Salmonella Typhi isolates (six for GyrB Phe-464, one for GyrB Leu-465 and one for GyrB Asp-466), and mutations GyrB Phe-464 and GyrB Asp-466 seem to be related to the decreased ciprofloxacin susceptibility phenotype in Salmonella Typhi. This assay can also be used directly on boiled single colonies. The assay presented here would be useful for clinical and reference laboratories to rapidly screen quinolone-resistant isolates of Salmonella Typhi and Salmonella Paratyphi A, and decipher the underlying genetic changes for epidemiological purposes.

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Sprache(n): eng - English
 Datum: 2010-08
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 529988
ISI: 000280018400016
 Art des Abschluß: -

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Titel: Journal of Antimicrobial Chemotherapy
  Alternativer Titel : J. Antimicrob. Chemother.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 65 (8) Artikelnummer: - Start- / Endseite: 1631 - 1641 Identifikator: ISSN: 0305-7453