TABLE 2.
Detection of NDRV antibody in field serum and egg yolk samples from vaccinated breeding Muscovy ducks by blocking ELISA
| Blocking ELISA | Positive (n) | Negative (n) | Positive rate (%) |
|---|---|---|---|
| Breeding Muscovy duck | 979 | 59 | 94.5 |
| Egg yolk | 496 | 44 | 91.9 |
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