Figure 1: Standard curve for a 10-fold dilution series of S. typhimurium on tomato surfaces after Q-PCR performance. Threshold cycle (Ct) is plotted on the axis of ordinates and log CFU genome equivalent is plotted on the axis of abscissae. A Ct value represents 1/125 of the total inoculated area (5 × 5 mm2), corresponding with the area of one ME sensor. Each data point represents the mean of triplicate samples taken from three replicate experiments (n=9).