Table 1. The clinical outcome of pregnancy in year 1 for ewes intranasally inoculated with C. abortus prior to pregnancy (group1–3), intranasally administered control inoculum (group 4a) or subcutaneously injected with C. abortus at 70 days of gestation (group 5).
| Group | Number of ewes | Number of lambs | |||||
| Pregnant | Lambed (%) | Aborted (%) | Mean gestational length | Viable | Non-viablea | Dead | |
| 1 | 16 | 6 (41) | 10 (59) | 125 | 8 | 4 | 8 |
| 2 | 18 | 6 (33) | 12 (67) | 127 | 7 | 8 | 9 |
| 3 | 19 | 18 (95) | 1 (5) | 141 | 25 | 1b | 1 |
| 4a | 8 | 8 (100) | 0 (0) | 144 | 10 | 1b | 0 |
| 5 | 6 | 3 (50) | 3 (50) | 134 | 4 | 0 | 5 |
a
Includes neonatal deaths (born live but died within 48 hrs) and stillbirths.
b
Death due to dystocia.