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The effect of dietary quercetin supplementation and FMT on intestinal morphology and intestinal epithelial apoptosis in weanling piglets. (a) Representative H&E or TUNEL stained jejunum sections. (b) Villus height. (c) Crypt depth. (d) Villus height/crypt depth ratio. (e) AOD of TUNEL staining (green). Scale bar 500 μm (H&E) and 100 μm (TUNEL); ∗P < 0.05, ∗∗P < 0.01, and ∗∗∗P < 0.001.
