Figure 3c shows that the expression of Occludin and Claudin-1 was significantly reduced after ST infection (p < 0.05), while pretreatments with LP postbiotics as well as LPBactive significantly reversed this trend (p < 0.05). The expression level of protein Occludin notably maintained a higher level in LPBinactive + ST and LPC + ST groups than that of LPBactive (p < 0.05). Here, CLDN1 is linked to infection.