Table 2. Results of nasal cultures of placebo-vaccinated and pcDNA1::MOMP A-vaccinated turkeys after challenge.
| Mean score* of Chlamydophila psittaci nasal shedding ±SD† for the days postchallenge shown below (values in parenthesis represent the % of positive turkeys in each group) | |||||||
|---|---|---|---|---|---|---|---|
| Group (n = 5) | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
| 1 | 0·20 ± 0·44 | 0 | 0 | 0 | 0 | 0 | 0 |
| (20) | (0) | (0) | (0) | (0) | (0) | (0) | |
| 2 | 0·40 ± 0·54 | 0 | 0 | 0 | 0 | 0·20 ± 0·44 | 0·20 ± 0·44 |
| (40) | (0) | (0) | (0) | (0) | (20) | (20) | |
| 3 | 1·0 ± 0 | 0·20 ± 0·44 | 0·20 ± 0·44 | 0·20 ± 0·44 | 0·40 ± 0·54 | 0·60 ± 0·89 | 0·80 ± 0·22 |
| (100) | (20) | (20) | (20) | (40) | (60) | (80) | |
| 4 | 0·60 ± 0·89 | 0 | 0 | 0 | 0 | 0·20 ± 0·44 | 0·20 ± 0·44 |
| (60) | (0) | (0) | (0) | (0) | (20) | (20) | |
| 5 | 1·40 ± 0·55 | 1·40 ± 0·55 | 1·40 ± 0·55 | 1·60 ± 0·59 | 1·80 ± 0·44 | 2·0 ± 0 | 2·60 ± 0·54 |
| (100) | (100) | (100) | (100) | (100) | (100) | ||
| 7 | 0·60 ± 0·89 | 1·20 ± 0·40 | 1·20 ± 0·40 | 1·40 ± 0·56 | 1·80 ± 1·0 | 1·80 ± 1·0 | 2·0 ± 1·22 |
| (60) | (60) | (60) | (80) | (80) | (80) | (80) | |
| 8 | 1·0 ± 0 | 1·40 ± 0·55 | 1·20 ± 0·37 | 1·80 ± 0·44 | 2·0 ± 0 | 2·40 ± 0·50 | 2·20 ± 0·45 |
| (100) | (100) | (100) | (100) | (100) | (100) | ||
| 9 | 1·40 ± 0·55 | 1·40 ± 0·55 | 1·60 ± 0·59 | 1·80 ± 1·0 | 1·80 ± 1·0 | 2·0 ± 0 | 2·20 ± 0·45 |
| (100) | (100) | (100) | (100) | (100) | (100) | (100) | |
*
Shedding was scored from 0 to 3. Score 0 indicated no viable chlamydophilae present. Scores 1, 2 or 3 were given when a mean of 1–5, 5–10 or > 10 inclusion-positive cells, respectively, were present per five randomly selected microscopic fields. No shedding was observed in groups 6 and 10.
†
SD, standard deviation.