TABLE 3.
Reciprocal titers of antibody to LPS and S. typhimurium lysate in sera and vaginal secretions of BALB/c mice orally immunized with PspA-expressing S. typhimurium χ4550(pYA3193)a
| Sample | Reciprocal titer of antibody reactive with:
|
|||||
|---|---|---|---|---|---|---|
|
Salmonella LPS
|
Salmonella lysate
|
|||||
| IgG | IgM | IgA | IgG | IgM | IgA | |
| Serum | 5 × 104 | 103 | 5 × 102 | 105 | 4 × 104 | 5 × 102 |
| Vaginal secretions | 102 | 5 × 102 | 102 | 103 | 5 × 102 | 2 × 102 |
a
Serum and vaginal secretions from 10 BALB/c mice were pooled separately 4 weeks after the second oral immunization. Anti-LPS and anti-Salmonella titers were not detected (<101) in preimmune serum or vaginal secretions.