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  • 1 Molecular Microbiology and Genomics Consultants, Germany
  • | 2 Institute of Medical Microbiology and Hygiene, Germany
  • | 3 vermicon AG, Germany
  • | 4 Berlin, Germany
  • | 5 Center for Biological Sequence Analysis, Department of Systems Biology, Denmark
  • | 6 SymbioPharm GmbH, Germany
  • | 7 GlaxoSmithKline Biologicals, Germany
Open access

The probiotic product Symbioflor2 (DSM 17252) is a bacterial concentrate of six different Escherichia coli genotypes, whose complete genome sequences are compared here, between each other as well as to other E. coli genomes. The genome sequences of Symbioflor2 E. coli components contained a number of virulence-associated genes. Their presence seems to be in conflict with a recorded history of safe use, and with the observed low frequency of adverse effects over a period of more than 6 years. The genome sequences were used to identify unique sequences for each component, for which strain-specific hybridization probes were designed. A colonization study was conducted whereby five volunteers were exposed to an exceptionally high single dose. The results showed that the probiotic E. coli could be detected for 3 months or longer in their stools, and this was in particular the case for those components containing higher numbers of virulence-associated genes. Adverse effects from this long-term colonization were absent. Thus, the presence of the identified virulence genes does not result in a pathogenic phenotype in the genetic background of these probiotic E. coli.

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Senior editors

Editor(s)-in-Chief: Dunay, Ildiko Rita

Editor(s)-in-Chief: Heimesaat, Markus M.

Vice Editor(s)-in-Chief: Fuchs, Anja

Editorial Board

Chair of the Editorial Board:
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)


Dr. Dunay, Ildiko Rita
Magdeburg, Germany

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CrossRef Documents 23
WoS Cites 708
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Days from submission to acceptance 219
Days from acceptance to publication 176
Acceptance Rate 70%



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European Journal of Microbiology and Immunology
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ISSN 2062-509X (Print)
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