<p>C57BL/6 mice were orally gavaged with increasing doses of <i>L. gasseri</i> expressing PA-DCpep (10<sup>7</sup>, 10<sup>9</sup> and 10<sup>12</sup> CFU) or PBS; LPLs were harvested by collagenase digestion after days 1, 3, 7 and 14, and stained with antibodies against CD4, CD8, RORγT, IL-17 and IL-22 (A&B) before analysis by flow cytometry. Data are representative of two independent experiments. Error bars represent ±SEM. *P<0.05 and **P<0.01 compared with PBS. (C) C57BL/6 mice were orally gavaged with increasing doses of <i>L. gasseri</i> expressing PA-DCpep (10<sup>7</sup>, 10<sup>9</sup> and 10<sup>12</sup> CFU) or PBS; colonic sections were stained with RORγT (red) and CD4 (green) antibodies, and visualized using confocal microscopy.</p
