• Turk J Med Sci · Jan 2015

    Antibiofilm activity of trans-cinnamaldehyde, p-coumaric, and ferulic acids on uropathogenic Escherichia coli.

    • Barbara Kot, Jolanta Wicha, Małgorzata Piechota, Katarzyna Wolska, and Agata Gruzewska.
    • Turk J Med Sci. 2015 Jan 1; 45 (4): 919-24.

    Background/AimBiofilm on urinary catheters results in persistent infections that are resistant to antibiotics. In this study, phytochemicals were assessed as alternative antimicrobials in preventing and inactivating E. coli biofilm on urinary catheters.Materials And MethodsBiofilm prevention was tested using catheter fragments inoculated with E. coli and treated with trans- cinnamaldehyde, p-coumaric, and ferulic acids (0%, 0.1%, 0.25%, and 0.5%) for 0, 1, 3, and 5 days. Inactivation of E. coli biofilm with the same agents at concentrations of 0%, 1%, 1.25%, or 1.5% used for 0, 1, 3, or 5 days was also evaluated.ResultsAll used concentrations of trans-cinnamaldehyde prevented and effectively inactivated E. coli biofilm formed on urinary catheter fragments. p-Coumaric (0.25% and 0.5%) and ferulic acids (0.5%) had preventive action on E. coli biofilm formation in urinary catheter fragments. The number of uropathogenic E. coli cells in biofilm formed in the lumen of a urinary catheter was significantly reduced in the presence of p-coumaric and ferulic acids, but complete inactivation of the biofilm formed was not observed, as opposed to the use of trans-cinnamaldehyde.ConclusionThe obtained results indicate that phytochemicals maybe an important source of antibiofilm agents that have preventive action on E. coli biofilm formation on urinary catheters.

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