TABLE 3.
Intestinal lesion scores of birds immunized with three injections intramuscularly and then infected with a mild challenge with C. perfringens
| Protein | No. of chickens | No. of chickens with the following lesion scores:
|
Mean no. of chickens | |||||
|---|---|---|---|---|---|---|---|---|
| 0 | 1+ | 2+ | 3+ | 4+ | 5+ | |||
| Vehicle-only controls | 10 | 1 | 3 | 4 | 1 | 1 | 0 | 1.55 |
| Culture supernatanta | 10 | 8 | 1 | 1 | 0 | 0 | 0 | 0.4 |
| Alpha-toxoid | 12 | 3 | 4 | 3 | 1 | 1 | 0 | 1.41 |
| HPa | 12 | 10 | 2 | 0 | 0 | 0 | 0 | 0.16 |
| GPDa | 10 | 7 | 2 | 1 | 0 | 0 | 0 | 0.4 |
| tPFORa | 10 | 4 | 5 | 1 | 0 | 0 | 0 | 0.7 |
| FBAa | 10 | 4 | 6 | 0 | 0 | 0 | 0 | 0.6 |
a
Immunized groups that had significantly fewer chickens with lesions than the unimmunized vehicle-only control group (Fisher's exact test, P ≤ 0.05).