In this study, L. sarlivarius B1 was isolated from the intestinal mucosa of a healthy piglet. It was confirmed to possess excellent probiotic properties, such as high lactic acid production and strong adhesion to Caco-2 cells in vitro. The neonatal piglet was used to investigate the effect on functions of mucosal immune and the mechanism of L. sarlivarius B1 in piglets. Furthermore, E. coli k88 infection model was used to study the resistance of L. sarlivarius B1 on infection of intestinal pathogen.
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