Fig. 3

a Biofilm quantification with Crystal violet assay. The data represent an average of triplicate experiments ± SD (*p < 0.05, t-test, two sided) (**p < 0.005, t-test, two sided). b Congo red agar plates showing a whitish colony in the treated cells, an indicator of reduction in the curli production. c ThT fluorescence spectra. d Congo red fluorescence spectra. e TBO fluorescence spectra