FIG. 3.

Antibody responses against rTetC (A) and rSh28GST (B), as detected by ELISA, from mice immunized orally with S. enterica serovar Typhimurium strains SL3261 (I), JJ702 harboring pTECH2 (II), JJ703 harboring pTECH2-Sh28 (III), and JJ704 harboring pTECH10-Sh28 (IV). Pooled sera from a group of eight mice bled at weeks 3, 5, 7, 9, and 11 were analyzed, and each value is expressed as the log₁₀ end point titer as described in Materials and Methods.