FIGURE 7.

Antimicrobial activity of the intestinal fluids against pathogens, throughout the lives of the animals. Mice of 21, 28, 35, 42, 54, 61, and 180 days old were fed with Conventional diet, L. casei CRL431 or L. paracasei CNCM-I 1518, for 7 and 5 days, respectively. At this time samples of intestinal fluids were taken and studied for their S. Typhimurium antimicrobial activity after 2 h of incubation by plate count agar. Results were expressed as CFU/ml (mean ± SEM). Results were expressed as the differences in the CFU/ml before and after the incubation of the bacteria with the intestinal fluids. The statistic differences were calculated with respect to the control group that received conventional diet ^∗p < 0.05, ^∗∗p < 0.01, ^∗∗∗p < 0.001.