Figure 5

Specific IgA levels in ophthalmic and vaginal wash were detected after oral immunization (10 mice every group administered with different recombinant strains). Specific IgA antibody titers were detectable in the mice immuned with pPG612.1-VP4 and pPG612.1-VP4-LTB after the first administration (Fig. 5A, B). Statistically significant difference (** P < 0.01) was observed in ophthalmic and vaginal wash of mice administered with recombinant strains after seven days. IgA levels elicited by pPG612.1-VP4-LTB were higher than those elicited following pPG612.1-VP4 immunization and the difference is significant statistically (** P < 0.01). Bars represent the IgA titers ± standard errors of the means in each group.