TABLE 2.
Diagnostic performance measures for the three tests on abattoir cattle considering liver inspection as the gold standard method (n = 139, 10 positive cases)a
| Performance measures | Native antigens | Recombinant antigen | |
|---|---|---|---|
|
FhES estimate (95% CI) |
FhSA estimate (95% CI) |
FhrCL-1 estimate (95% CI) |
|
| Cutoff | 0.4895 (OD) | 0.379 (OD) | 0.1050 (OD) |
| Sensitivity | 8/10 (0.80) (0.46–0.95) |
7/10 (0.70) (0.38–0.90) |
7/10 (0.70) (0.38–0.90) |
| Specificity | 104/129 (0.81) (0.73–0.87) |
113/129 (0.88) (0.81–0.92) |
112/129 (0.87) (0.80–0.92) |
| PPV | 8/33 (0.24) (0.17–0.34) |
7/23 (0.30) (0.19–0.45) |
7/24 (0.29) (0.18–0.43) |
| NPV | 104/106 (0.98) (0.94–0.99) |
113/116 (0.97) (0.94–0.99) |
112/115 (0.97) (0.94–0.99) |
a
CI= Confidence Intervals; PPV= Positive Predictive Values; NPV= Negative Predictive Values; OD= Optical Density.