TABLE 4.
Mortalities observed in fish vaccinated with the A. hydrophila aroA mutant after challenge with the AG2 wild-type strain
| Time (days) postchallenge | No. of fish that died ina:
|
|||
|---|---|---|---|---|
| Expt 1
|
Expt 2
|
|||
| Controls | Vaccinated | Controls | Vaccinated | |
| 1 | NDb | ND | 5 | 0 |
| 2 | 6 | 3 | 6 | 3 |
| 3 | 2 | 0 | 1 | 0 |
| 4 | 2 | 3 | 1 | 2 |
| 5 | 2 | 0 | 1 | 0 |
| 6 | 1 | 1 | 1 | 0 |
| 7 | 0 | 0 | 0 | 0 |
| 8 | 0 | 0 | 2 | 0 |
| 9 | 0 | 0 | 1 | 0 |
| 10 | 0 | 0 | 2 | 0 |
| No. of survivors on day 21 (RPSc) | 7 | 13 (47%) | 0 | 15 (75%) |
a
20 fish per challenge group.
b
ND, not determined.
c
Calculated from the percentage of dead fish in each group 21 days after challenge.