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Effect of subcutaneous challenge of pregnant ewes with wild-type C. fetus subsp. fetus strain 23D or its defined mutants
| C. fetus subsp. fetus strain | No. of animals challenged | No. of culture-positive placentae | No. excreting C. fetus subsp. fetus in feces | No. of abortions or stillbirths |
|---|---|---|---|---|
| 23D | 5 | 5 | 1 | 1 |
| 23D:502 | 5 | 0 | 0 | 0 |
| 23D:501 | 6 | 2 | 1 | 1 |
| 23D:600(2) | 5 | 5 | 2 | 2 |
| 23D:600(4) | 5 | 5 | 2 | 2 |
