Table 6.
Antibody response and post-challenge mortality of chicks immunized with different vaccines and then challenged with NDV/Chicken/TC/1/2011
| NDV vaccine a | Mortality in each challengeb (%) 7DPC c | NDV-HI GMTd against LaSota strain 56 DPVe | 14 DPC |
|---|---|---|---|
| Oil-TC/1 | 0 | 147 | 1024 |
| Oil-Las | 17 | 147 | 1024 |
| Live-Las | 25 | 156 | 2048 |
| Oil-TC/1 plus Live-Las | 0 | 274 | 2048 |
| Oil-Las plus Live-Las | 9 | 362 | 2194 |
| Un-inoculated control | 100 | All died | All died |
aAt the age of 3 weeks, twelve chicks per group were vaccinated, respectively. After 2 weeks, a booster dose of each vaccine was administered to the bird. Blood samples were taken on 3 week after booster
bOral challenge with the allantonic fluid of virulent NDV/Chicken/TC/1/2011 isolate
cDPC: days post-challenge
dNDV-HI GMT: geometric mean titer of NDV hemagglutination-inhibition titer
eDPV: days post-vaccination