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Cytotoxicity of Listeria monocytogenes in Caco‐2 cells pre‐exposed with Lactobacillus casei over time (1, 4, 16, 24 h). Cytotoxicity value for L. monocytogenes treatment (1 h) in the absence of L. casei strains was 64.38%. Data are averages of three experiments ran in duplicates. For each time point, bars marked with different letters (a, b, c, d, e, f, g) indicate significant difference at P < 0.05.
