Abstract
The present study was conducted to investigate the effect of Artemisia argyi on the production performance and intestinal barrier of rabbits. Weaned Hyla rabbits (30 d, n = 160) of similar body weight were divided into 4 groups (40 rabbits per treatment), and they were fed a control diet or fed an experimental diet supplemented with 3%, 6%, or 9% A. argyi. The results showed that the dietary supplementation with A. argyi did not affect the rabbits' food intake and body weight gain regardless of the inclusion level but decreased the diarrhea rate and diarrhea index (P < 0.05). Dietary addition of A. argyi increased the small intestine length and villus height/crypt depth, regardless of the inclusion level (P < 0.05). Compared with the control, the A. argyi supplementation increased the gene expression of zonula occludens 1 (ZO-1) and claudin 1 in all segments of the small intestine and regardless of the level of A. argyi (P < 0.05). In the duodenum, a dietary supplementation with 6% and 9% A. argyi increased the immunoglobulins A (IgA) content (P < 0.05). In the jejunum, the A. argyi supplementation decreased interleukin 2 (IL2) and IL6 content regardless of the inclusion level (P < 0.05). In the ileum, a 3% A. argyi addition decreased IL2 content, whereas a 6% A. argyi addition decreased IL6 content (P < 0.05). Furthermore, 6%-9% A. argyi supplementation increased the IgA content in the ileum (P < 0.05). In conclusion, dietary addition of A. argyi reduces diarrhea and modulates the gut immune function without affecting growth performances of rabbits.
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