Table 2: Blood levels of IgM, IgG1 ,and IgA (mean ± SD) (mg/dL).

GroupsIgM IgG1IgA

Normal 3.07 ± 0.470.56 ± 0.151.28 ± 0.44
TP 10.52 ± 0.76* 2.58 ± 0.43*2.01 ± 0.73
TPG8.56 ± 0.76* 2.37 ± 0.61*1.86 ± 0.12
TPI 20.37 ± 1.11** 4.47 ± 0.51**2.55 ± 0.34

* , TP, TPG versus Normal group; ** , TPI versus TP, TPG and Normal group.
TP: attenuated S. typhimurium with the eukaryotic expression vector; TPI: attenuated S. typhimurium with the eukaryotic expression plasmid carrying IL-2 gene; TPG: attenuated S. typhimurium with the eukaryotic expression plasmid carrying GFP gene.