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Serum bactericidal assay.
| Strains | Serum heat treatment | Growth ratea |
|---|---|---|
| P. multocida 0818 | – | 160 ± 47 |
| + | 153 ± 28 | |
| S985 | – | 1 ± 0.4b |
| + | 31 ± 12 | |
| S985 (pSS911) | – | 142 ± 43 |
| + | 165 ± 38 |
The data represent the means and SD of three independent experiments.
The difference in sensitivity between S985 in heated or unheated serum was determined to be significant (p < 0.01).
