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Comparison of the BVDV E2 cELISA with virus neutralization test (VNT).
| Serum | VNT | Agreement (%) a | Kappa value b | |||
|---|---|---|---|---|---|---|
| cELISA | No | Positive | Negative | |||
| Vaccinated sera | Positive | 156(A) | 156(B) | 0 | 100 | 1 |
| Negative | 4(C) | 0 | 4(D) | |||
| Clinical sera | Positive | 66(A) | 64(B) | 2 | 95.8% | 0.908 |
| Negative | 124(C) | 6 | 118(D) | |||
Agreement (%) =(B+D)/(A+C).
The kappa value > 0.4 was regarded as significant difference.
