TABLE 2.
Efficacy of B. abortus RB51 or RB51+sodC,wboA strain in protecting against experimental challenge at midgestation with 107 CFU of B. abortus strain 2308
| Vaccination group | Vaccination dose (CFU) | Rate (%) of abortion or infection (no. aborted or infected/total no.)a
|
|||
|---|---|---|---|---|---|
| Abortion | Fetal/uterine infection | Mammary infection | Maternal infection | ||
| RB51 | 4.26 × 1010 | 33 (2/6)* | 50 (3/6)* | 33 (2/6)* | 50 (3/6)* |
| RB51+sodC, wboA | 7.4 × 1010 | 66 (4/6) | 83 (5/6) | 66 (4/6) | 100 (6/6) |
| Control | 100 (8/8) | 100 (8/8) | 100 (8/8) | 100 (8/8) | |
a
Means denoted with an asterisk (*) are significantly different (P < 0.05) from the control treatment.