Fig. 3

Antibody production. a Anti-TTFC specific fecal sIgA detected on days 14, 21 and 35. Data were expressed as the mean (± standard error) of absorbance values at 492 nm. b Anti-TTFC specific serum IgG detected on days 14, 21, and 35. Not-immunized (naïve and probiotic) groups did not produce anti-TTFC antibodies and were not reported in the figure. The data represent the mean (± standard error) of reciprocal endpoint titers. Equal letters mean no statistical difference (p > 0.05) and different letters mean a statistical difference (p < 0.05) between the experimental groups