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Clinical Chemistry and Laboratory Medicine (CCLM)

Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)

Editor-in-Chief: Plebani, Mario

Ed. by Gillery, Philippe / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Payne, Deborah A. / Schlattmann, Peter / Tate, Jillian R.

12 Issues per year


IMPACT FACTOR 2017: 3.556

CiteScore 2017: 2.34

SCImago Journal Rank (SJR) 2017: 1.114
Source Normalized Impact per Paper (SNIP) 2017: 1.188

Online
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1437-4331
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Volume 46, Issue 9

Issues

Preliminary validation of real-time PCR assays for the identification of Yersinia pestis

Herbert Tomaso / Daniela Jacob
  • 2Robert Koch-Institut, Zentrum für Biologische Sicherheit, Hochpathogene mikrobielle Erreger, Berlin, Germany
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/ Meike Eickhoff / Holger C. Scholz / Sascha Al Dahouk / Mireille M. Kattar
  • 6Molecular Infectious Diseases Diagnostics, Department of Pathology and Laboratory Medicine, American University of Beirut, Beirut, Lebanon
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/ Udo Reischl / Helga Plicka / Jaran Strand Olsen / Simo Nikkari
  • 10Center for Biothreat Preparedness, and BC-Defense and Environmental Health Unit, Center for Military Medicine, Helsinki, Finland
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/ Pirjo Matero
  • 11Center for Biothreat Preparedness, and BC-Defense and Environmental Health Unit, Center for Military Medicine, Helsinki, Finland
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/ Christian Beuret
  • 12Biology Spiez Laboratory, Federal Department of Defense, Civil Protection and Sports, Federal Office for Civil Protection, Spiez, Switzerland
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/ Andrea Ciammaruconi
  • 13Health Corps, Italian Army, Histology and Molecular Biology Section, Army Medical and Veterinary Research Center, Roma, Italy
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/ Florigio Lista
  • 14Health Corps, Italian Army, Histology and Molecular Biology Section, Army Medical and Veterinary Research Center, Roma, Italy
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/ Jean-Luc Gala
  • 15Center for Applied Molecular Technologies, Defense Laboratories Department, Belgian Armed Forces, Brussels, Belgium
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/ Hermann Broll / Bernd Appel / Ricela E. Sellek Cano / Maria del Carmen Ybarra de Villavicencio / Martien Broekhuijsen / Alexander Indra / Roger Petersen / Heinrich Neubauer
Published Online: 2008-07-21 | DOI: https://doi.org/10.1515/CCLM.2008.251

Abstract

Background: Yersinia pestis (Y. pestis) is a zoonotic bacterium mainly circulating among rodents and their fleas. Transmission to humans can cause bubonic, pneumonic or septicemic plague with a high case-fatality rate. Therefore, rapid and reliable diagnostic tools are crucial. The objective of this study was to assess the inter-laboratory reproducibility of in-house developed real-time PCR assays for the identification of Y. pestis.

Methods: A total of four samples of quantified Y. pestis DNA and two blank samples were sent blinded to 14 laboratories. To standardize the procedures, oligonucleotides were provided and the same instrument platform and a commercial mastermix were used. The participants were requested to report their results including cycle threshold and melting temperature values.

Results: All participating laboratories were able to perform the real-time PCR assays according to the protocols provided and identified the samples containing Y. pestis DNA correctly. Significant differences between the reference laboratory and participating laboratories were observed in cycle threshold values and melting temperatures. This, however, did not adversely affect the interpretation of results.

Conclusions: Our real-time PCR system proved to be highly reproducible and has the potential of complementing the diagnostic tools for rapid identification of Y. pestis isolates. Further steps of validation are needed to determine diagnostic accuracy and predictive values with clinical samples.

Clin Chem Lab Med 2008;46:1239–44.

Keywords: Yersinia pestis; real-time PCR

About the article

Corresponding author: Dr. Herbert Tomaso, Bundeswehr Institute of Microbiology, Neuherbergstrasse 11, 80937 Munich, Germany Phone: +49-89-3168-3933, Fax: +49-89-3168-3292,


Received: 2008-03-12

Accepted: 2008-05-12

Published Online: 2008-07-21

Published in Print: 2008-09-01


Citation Information: Clinical Chemistry and Laboratory Medicine, Volume 46, Issue 9, Pages 1239–1244, ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: https://doi.org/10.1515/CCLM.2008.251.

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