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Eva Sapi University of New Haven, West Haven, CT 06516, USA

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Priyanka A. S. Theophilus University of New Haven, West Haven, CT 06516, USA

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Truc V. Pham University of New Haven, West Haven, CT 06516, USA

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Divya Burugu University of New Haven, West Haven, CT 06516, USA

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David F. Luecke University of New Haven, West Haven, CT 06516, USA

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Borrelia burgdorferi, the causative agent of Lyme disease, is capable of forming biofilm in vivo and in vitro, a structure well known for its resistance to antimicrobial agents. For the formation of biofilm, signaling processes are required to communicate with the surrounding environment such as it was shown for the RpoN—RpoS alternative sigma factor and for the LuxS quorum-sensing pathways. Therefore, in this study, the wild-type B. burgdorferi and different mutant strains lacking RpoN, RpoS, and LuxS genes were studied for their growth characteristic and development of biofilm structures and markers as well as for their antibiotic sensitivity. Our results showed that all three mutants formed small, loosely formed aggregates, which expressed previously identified Borrelia biofilm markers such as alginate, extracellular DNA, and calcium. All three mutants had significantly different sensitivity to doxycyline in the early log phase spirochete cultures; however, in the biofilm rich stationary cultures, only LuxS mutant showed increased sensitivity to doxycyline compared to the wild-type strain. Our findings indicate that all three mutants have some effect on Borrelia biofilm, but the most dramatic effect was found with LuxS mutant, suggesting that the quorum-sensing pathway plays an important role of Borrelia biofilm formation and antibiotic sensitivity.

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Senior editors

Editor(s)-in-Chief: Dunay, Ildiko Rita, Prof. Dr. Pharm, Dr. rer. nat., University of Magdeburg, Germany

Editor(s)-in-Chief: Heimesaat, Markus M., Prof. Dr. med., Charité - University Medicine Berlin, Germany

Editorial Board

  • Berit Bangoura, Dr. DVM. PhD,  University of Wyoming, USA
  • Stefan Bereswill, Prof. Dr. rer. nat., Charité - University Medicine Berlin, Germany
  • Dunja Bruder, Prof. Dr. rer. nat., University of Magdeburg, Germany
  • Jan Buer, Prof. Dr. med., University of Duisburg, Germany
  • Edit Buzas, Prof. Dr. med., Semmelweis University, Hungary
  • Renato Damatta, Prof. PhD, UENF, Brazil
  • Maria Deli, MD, PhD, DSc, Biological Research Center, HAS, Hungary
  • Olgica Djurković-Djaković, Prof. Phd, University of Belgrade, Serbia
  • Jean-Dennis Docquier, Prof. Dr. med., University of Siena, Italy
  • Zsuzsanna Fabry, Prof. Phd, University of Washington, USA
  • Ralf Ignatius, Prof. Dr. med., Charité - University Medicine Berlin, Germany
  • Achim Kaasch, Prof. Dr. med., Otto von Guericke University Magdeburg, Germany
  • Oliver Liesenfeld, Prof. Dr. med., Inflammatix, USA
  • Matyas Sandor, Prof. PhD, University of Wisconsin, USA
  • Ulrich Steinhoff, Prof. PhD, University of Marburg, Germany
  • Michal Toborek, Prof. PhD, University of Miami, USA
  • Susanne A. Wolf, PhD, MDC-Berlin, Germany

 

Dr. Dunay, Ildiko Rita
Magdeburg, Germany
E-mail: ildiko.dunay@med.ovgu.de

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European Journal of Microbiology and Immunology
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