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Anti-FomA antibody levels following oral vaccination with L. acidophilus expressing the FomA protein. The difference between the OD 450 and OD 570 nm was taken as the final index. a Levels of FomA-specific IgG in the serum of the immunised mice. b Levels of FomA-specific sIgA in the saliva of the immunised mice. *Compared with the control group, a p value < 0.05 is considered statistically significant.
