Table 2.

Summary and evaluation of the performance of different detection methods

Biofilm formed at 33 °C and 40 rpm for 24 h was quantified by the different methods as described in Materials and methods. Signals are measured by absorbance (green), fluorescence (orange), or luminescence (blue). Absolute signals of biofilm treated with 0.9 % NaCl (SNC - negative control) are compared with the background signal from wells without bacteria (BG) and the standard deviation of the background (SD). The maximal detectable reduction (MDR) value reflects the detection limits which should be distinguishable from noise of BG