Table 5.
Protection rate conferred by the Δfur mutant.
| Group | Immunization | Challenge | Survival | Protection |
|---|---|---|---|---|
| Immune group | 1 × 105 CFU of S985 (Δfur) | 5 × 108 CFU of P. multocida 0818 | 31/50 | 62% |
| Control | PBS | 5 × 108 CFU of P. multocida 0818 | 0/15 | 0 |
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