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Results of in vivo IBDV virulence to SPF chickens
| Group | IBDV strain | Mortality (%) | BBIX at 7 dpi* |
|---|---|---|---|
| 1 | CJ801 | 5/10 (50) | 0.506 ± 0.105 |
| 2 | HN | 6/10 (60) | 0.296 ± 0.095 |
| 3 | Normal control | 0/10 (0) | 1 ± 0.051 |
BBIX = (bursa: body weight ratios)/(bursa: body weight ratios in the negative group).
