Table 5. MOMP-specific antibody titres following DNA vaccination and subsequent challenge with the homologous Chlamydophila psittaci strain.
| Mean MOMP-specific serum antibody titres ± SD in turkeys in the groups shown below | ||||||||
|---|---|---|---|---|---|---|---|---|
| Time of serum collection | 1 | 2 | 3 | 4 | 5 | 7 | 8 | 9 |
| Prevac* | < | < | < | < | < | < | < | < |
| 21 days PPV | 360 ± 89 | 320 ± 89 | 360 ± 89 | 480 ± 165 | < | 200 ± 122 | < | < |
| 14 days PBV | 5760 ± 2304 | 1920 ± 716 | 500 ± 269 | 10880 ± 4293 | < | 400 ± 346 | < | < |
| 18 days PC | 2400 ± 1131 | 2240 ± 876 | 7040 ± 5258 | 3400 ± 1315 | 10880 ± 4293 | 8320 ± 4293 | 10240 ± 4582 | 9600 ± 4582 |
*
Prevac, bleed at hatching, before DNA vaccination.
PBV, postbooster vaccination; PC, postchallenge; PPV, postprimary vaccination; < no antibodies detected at the serum dilution used (1:100).