Oral administration of L. lactis NCDO 2118 did not alter secretory IgA production. (A) Intestinal faeces were collected and total sIgA was measured by ELISA in mice from control, DSS and DSS + NCDO2118 groups. (B) Intestinal faeces from healthy mice were collected after 2, 3 or 4 days of L. lactis administration, and total sIgA was measured by ELISA. Bars represent the mean ± MSE of 5 mice per group. **, p < 0.01.