| 
      aNot detectable
        | Samples | Incubation time (h) | Number of S. Pullorum detected, log (C, cfu mL-1) |  
        | Amperometric sensor
          methods | Conventional methods |  
        | S1 | 1.0 | _a | 1.82 ± 0.37 |  
        | 1.5 | 3.13 ± 0.56 | 3.42 ± 0.28 |  
        | 2.0 | 3.55 ± 0.49 | 3.67 ± 0.31 |  
        | 2.5 | 4.15 ± 0.52 | 4.46 ± 0.46 |  
        | S2 | 1.0 | 1.90 ± 0.71 | 2.15 ± 0.43 |  
        | 1.5 | 2.97 ± 0.63 | 3.13 ± 0.52 |  
        | 2.0 | 3.28 ± 0.65 | 3.85 ± 0.62 |  
        | 2.5 | 3.96 ± 0.46 | 4.23 ± 0.74 |  
        | S3 | 1.0 | 2.12 ± 0.56 | 2.37 ± 0.49 |  
        | 1.5 | 3.05 ± 0.37 | 2.96 ± 0.52 |  
        | 2.0 | 3.78 ± 0.41 | 3.52 ± 0.57 |  
        | 2.5 | 4.15 ± 0.53 | 3.97 ± 0.62 |  |