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Levels of secreted immunoglobulin A (sIgA) in the jejunal mucosa. CON, basal diets; ANT, basal diets + antibiotics; PRO, basal diets + probiotics; ABSP, basal diets + Achyranthes bidentata polysaccharides; P-ABPS: basal diets + probiotics + Achyranthes bidentata polysaccharides. Different letters (a,b) above the error bars indicated significant differences (p < 0.05). n = 6 means data come from six pigs per dietary treatment.
