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Macrophage polarization status. Mean immunohistochemistry score (H-score) in sacculus rotundus in the challenged controls (CC), commercial vaccine (CV), commercial vaccine and probiotic (CV-PR), and probiotic (PR) animals for (A) CD163, (B) IFNγ, (C) MAC 387- calprotectin, and (D) TNF-α. ANOVA with Tukey’s post-hoc test was applied, and the significant level was *p < 0.05.
