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  • 1 German Armed Forces Hospital of Hamburg Department of Tropical Medicine at the Bernhard Nocht Institute Bernhard Nocht street 74 D-20359 Hamburg Germany
  • 2 University Medicine Rostock Institute for Medical Microbiology, Virology and Hygiene Rostock Germany
Open access

Here, we assessed the extraction efficiency of a deployable bench-top nucleic acid extractor EZ1 in comparison to the column-based approach with complex sample matrices.A total of 48 EDTA blood samples and 81 stool samples were extracted by EZ1 automated extraction and the column-based QIAamp DNA Mini Kit. Blood sample extractions were assessed by two real-time malaria PCRs, while stool samples were analyzed by six multiplex real-time PCR assays targeting bacterial, viral, and parasitic stool pathogens. Inhibition control PCR testing was performed as well.In total, 147 concordant and 13 discordant pathogen-specific PCR results were obtained. The latter comprised 11 positive results after column-based extraction only and two positive results after EZ1 extraction only. EZ1 extraction showed a higher frequency of inhibition. This phenomenon was, however, inconsistent for the different PCR schemes. In case of concordant PCR results, relevant differences of cycle threshold numbers for the compared extraction schemes were not observed.Switches from well-established column-based extraction to extraction with the automated EZ1 system do not lead to a relevantly reduced yield of target DNA when complex sample matrices are used. If sample inhibition is observed, column-based extraction from another sample aliquot may be considered.

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Jeffrey S. Buguliskis (Thomas Jefferson University, USA)

  • Jörn Albring (University of Münster, Germany)
  • Stefan Bereswill (Charité - University Medicine Berlin, Germany)
  • Dunja Bruder (University of Megdeburg, Germany)
  • Jan Buer (University of Duisburg, Germany)
  • Jeff Buguliskis (Thomas Jefferson University, USA)
  • Edit Buzas (Semmelweis University, Hungary)
  • Charles Collyer (University of Sydney, Australia)
  • Renato Damatta (UENF, Brazil)
  • Ivelina Damjanova (Semmelweis University, Hungary)
  • Maria Deli (Biological Research Center, HAS, Hungary)
  • Olgica Djurković-Djaković (University of Belgrade, Serbia)
  • Jean-Dennis Docquier (University of Siena, Italy)
  • Anna Erdei (Eötvös Loránd University, Hungary)
  • Zsuzsanna Fabry (University of Washington, USA)
  • Beniam Ghebremedhin (Witten/Herdecke University, Germany)
  • Nancy Guillen (Institute Pasteur, France)
  • Georgina L. Hold (University of Aberdeen, United Kingdom)
  • Ralf Ignatius (Charité - University Medicine Berlin, Germany)
  • Zsuzsanna Izsvak (MDC-Berlin, Germany)
  • Achim Kaasch (University of Cologne, Germany)
  • Tamás Laskay (University of Lübeck, Germany)
  • Oliver Liesenfeld (Roche, USA)
  • Shreemanta Parida (Vaccine Grand Challenge Program, India)
  • Matyas Sandor (University of Wisconsin, USA)
  • Ulrich Steinhoff (University of Marburg, Germany)
  • Michal Toborek (University of Miami, USA)
  • Mary Jo Wick (University of Gothenburg, Sweden)
  • Susanne A. Wolf (MDC-Berlin, Germany)

 

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Magdeburg, Germany
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