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  • 1 Department of Medical Microbiology and Immunobiology, Albert Szent-Györgyi Medical Centre, Faculty of Medicine, University of Szeged Dóm tér 10, H-6720 Szeged, Hungary
  • 2 Department of Medical Microbiology and Immunobiology, Albert Szent-Györgyi Medical Centre, Faculty of Medicine, University of Szeged Dóm tér 10, H-6720 Szeged, Hungary
  • 3 Department of Medical Microbiology and Immunobiology, Albert Szent-Györgyi Medical Centre, Faculty of Medicine, University of Szeged Dóm tér 10, H-6720 Szeged, Hungary
  • 4 Department of Medical Microbiology and Immunobiology, Albert Szent-Györgyi Medical Centre, Faculty of Medicine, University of Szeged Dóm tér 10, H-6720 Szeged, Hungary
  • 5 Faculty of Pharmaceutical Sciences, Josai University Sakado, Saitama, Japan
  • 6 Meiji Pharmaceutical University Kiyose, Tokyo, Japan
  • 7 Department of Medical Microbiology and Immunobiology, Albert Szent-Györgyi Medical Centre, Faculty of Medicine, University of Szeged Dóm tér 10, H-6720 Szeged, Hungary
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The inhibition of bacterial motility was studied by a trifluoro methyl ketone derivative on two Escherichia coli strains (wild strain having a proton pump system and the proton pump-deficient mutant strain) and two Helicobacter pylori strains (clarithromycin susceptible and clarithromycin resistant). Evidence is presented of the inhibitory action of 1-(2-benzoxazolyl)-3,3,3-trifluoro-2-propanone (TF18) on the proton motive forces of the two bacterial strains by affecting the action of biological motor and proton efflux in the membranes. The swimming, the forward motion was more sensitive than the vibration or tumbling to the inhibition. We suppose that the inhibiton of bacterial motility is related to the virulence of bacteria: consequently the pathogenicity can be reduced in the presence of TF18.

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