Figure 4.

(A) Schematic representation of the multiplexed immunosensor developed by Viswanathan et al. for E. coli, Salmonella, and Campylobacter detection and the analytical signals obtained for the three bacteria by square-wave anodic stripping voltammetry (SWASV). Reproduced from [78] with permission from Elsevier. (B) Schematic representation of the aptasensor developed by Bagheryan et al. for Salmonella detection and the electrochemical impedance spectroscopy (EIS) signals obtained for different Salmonella concentrations included in the calibration curve. Reproduced from [73] with permission from Elsevier. (C) Schematic representation of the immunoassay based on magnetic beads developed by T.R. de Oliveira et al. using the microfluidic multiplex system shown in the picture. Reproduced from [75] with permission from Elsevier.