TABLE 1.
Protection against B. abortus infection conferred by immunization with heat-killed NPAP
| Immunization group | CFU/spleen (log)a | Protection (log) |
|---|---|---|
| PBS | 5.62 ± 0.16 | 0.00 |
| B. melitensis H38 | 3.63 ± 0.11** | 1.99 |
| S. meliloti | 5.34 ± 0.44 | 0.28 |
| O. anthropi | 4.82 ± 0.14** | 0.80 |
| M. loti | 4.96 ± 0.44* | 0.66 |
| A. tumefaciens | 5.46 ± 0.38 | 0.16 |
a
CFU counts in the spleens of mice immunized with NPAP were significantly lower (**, P < 0.01; *, P < 0.05) than those of mice receiving PBS (Dunnett's multiple-comparison test).