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Effect of L. fermentum on IgA concentration in faeces and intestinal tract of normal mice (a) IgA in one to three week faeces; (b–f) Duodenum, jejunum, ileum, colon and colon contents were detected after three weeks by ELISA, “*” indicates p < 0.05, and “**” indicates p < 0.01, “***” indicates p < 0.001, “****” indicates p < 0.0001 (compared with control group).
