TABLE 2.
Mortality, transmission, and serology test
| Group | % survival | No. of naïve chickens infected/total no. of naïve chickensa | No. of positive chickens/total no. of chicken tested |
VNT value (log2 ND100)b |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| NP ELISA |
HA5 ELISA |
NA1 ELISA |
|||||||||
| 42 days postimmunization | 10 days postchallenge | 21 days postimmunization | 42 days postimmunization | 10 days postchallenge | 42 days postimmunization | 10 days postchallenge | 42 days postimmunization | 10 days postchallenge | |||
| HA50FA | 89 | 2/2 | 0/9 | 7/8 | 5/9 | 9/9 | 8/8 | 0/9 | 1/8 | 4.8 | 10.1 |
| HA100Poly | 100 | 1/2 | 0/10 | 9/10 | 4/10 | 10/10 | 10/10 | 0/10 | 1/10 | 5.5 | 10.9 |
| HA50BAY | 90 | 2/2 | 0/10 | 9/9 | 0/10 | 10/10 | 9/9 | 0/10 | 2/9 | 5.6 | 10.7 |
| HA100BAY | 89 | 1/2 | 0/9 | 8/8 | 0/9 | 7/9 | 8/8 | 0/9 | 0/8 | 5.0 | 10.2 |
| Refvac | 100 | 0/2 | 5/5 | 5/5 | 5/5 | 5/5 | 5/5 | 0/5 | 0/5 | 9.9 | 12.1 |
| BAY98 | 0 | 2/2 | 0/5 | 0/5 | 0/5 | 0/5 | 2.2 | ||||
| negCo | 0/4 | 0/4 | 0/4 | 0/4 | 2.3 | ||||||
a
Two naïve chicken were integrated into each group 24 h after challenge infection.
b
Mean value per group (log2 ND100) against challenge virus.