Figure 6. The titers of serum IgG (I), secretory IgA (II), IgG1 (III) and IgG2a (IV) against the SalmonellaOMP in the immunized mice by ELISA analysis.

Secretory IgA was measured in vaginal washes of the mice. Group A, negative controls; group B, the mice immunized with JOL1954 ghost cells; group C, the mice immunized with JOL1754 ghost cells. Bars indicate the mean of all mice (n = 10) in each group and the vertical lines show the standard deviation (s.d.). PI; post-immunization, *P < 0.05, **P < 0.001 (vs. control group A).