Table 6.
Comparison of three commercial ELISAs for detection of PRRSV antibodies in pig serum
| ELISA II | ELISA III | ELISA IV | Used groups | |
|---|---|---|---|---|
| Sensitivity (%) | 96.0 | 100.0 | 91.5 | 1-2 (n = 266) |
| Specificity (%) | 99.0 | 95.1 | 96.4 | 3 (n = 309) |
| Positive predictive value (%) | 86.0 | 73.7 | 66.9 | 1-4 (n = 828) |
| Negative predictive value (%) | 98.7 | 100.0 | 97.4 | 1-4 (n = 828) |
| Accuracy (%) | 95.3 | 91.4 | 88.2 | 1-4 (n = 828) |
| Kappa coefficient (κ) | 0.88 | 0.83 | 0.71 | 1-4 (n = 828) |
Descriptive test parameters and measures of agreement. ELISA I was used as reference test. ELISA I - IDEXX PRRS X3 Ab test, ELISA II - INgezim PRRS 2.0, ELISA III - Priocheck® PRRSV Ab porcine, ELISA IV - CIVTEST suis PRRS E/S PLUS.