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(A) Immunohistochemical assessment of lymphocyte (CD3) numbers in the intestinal tract of piglets, magnification×100, ×400, scale bar = 50 μm; (B) The numbers of CD3+T cells were counted in random fields (×400) and differences were analyzed by one-way ANOVA, **P < 0.01. (C) The detection of cytokines and antiviral proteins in the blood of piglets, and differences between the different treatment groups were determined by one-way ANOVA, *P < 0.05, **P < 0.01
