CD4 and colitis: The administration of T. halophilus to DSS-induced colitis mice also increased the frequencies of IL-10+ cells in CD4+ T cells (36.31 ± 10.62% vs. 12.61 ± 4.45%, p < 0.05) and CD8+ T cells (38.97 ± 9.79% vs. 13.26 ± 6.74%, p < 0.05) (Figure 6B,D).