CD80 and colitis: The administration of T. halophilus to DSS-induced colitis mice significantly decreased the frequencies of CD80+ cells more than in non-treated colitis mice in PBL (43.95 ± 6.50 % vs. 61.60 ± 4.38%, p < 0.01) and in IELs (61.43 ± 7.20% vs. 73.13 ± 2.67%, p < 0.05), respectively (Figure 2C,G).