TABLE 4.
Pre- and postimmunization antibody titers for the vibriocidal assay
| Group | n | Geometric mean inverse antibody titer (range)
|
Fold increase | |
|---|---|---|---|---|
| Preimmunization | Postimmunization | |||
| All vaccinees | 40 | 30 (10-1,280) | 4,159 (160-40,960) | 139 |
| All placebo recipients | 19 | 35 (10-2,560) | 35 (10-2,560) | 0 |
| Subjects who participated in the challenge study | ||||
| Vaccinees | 24 | 25 (10-640) | 3,417 (160-40,960) | 137 |
| Placebo recipients | 12 | 45 (10-2,560) | 45 (10-2,560) | 0 |
| Subjects who did not participate in the challenge study | ||||
| Vaccinees | 16 | 40 (10-1,280) | 5,583 (640-20,480) | 140 |
| Placebo recipients | 7 | 22 (10-1,280) | 22 (10-1,280) | 0 |