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Protection efficiency of the immunized SPF chickens after challenged with the highly virulent NDV strain F48E9
| Groups | Number of dead chickens/total number of chickens | Mortality (%) | Protection (%) |
|---|---|---|---|
| O-2'-HACC/pFDNA i.n | 0/7 | 0 | 100 |
| O-2'-HACC/pFDNA i.m | 0/7 | 0 | 100 |
| Live attenuated NDV vaccine i.m | 0/7 | 0 | 100 |
| pVAX I -F(o)-C3d6 i.m | 2/7 | 28.6 | 71.4 |
| O-2′-HACC i.m | 7/7 | 100 | 0 |
| PBS i.m | 7/7 | 100 | 0 |
