Effects of Pediococcus acidilactici on Growth Performance, Intestinal Antioxidant Function, Morphological Structure and Microflora of Finishing Pigs
This study was conducted to investigate effects of Pediococcus acidilactici on growth performance, intestinal antioxidant function, morphological structure and microflora of finishing pigs. Forty-eight crossed-bred (Duroc×Landrace×Yorkshine) finishing pigs with similar body weight [(62.57±1.20) kg] were select-ed and randomly allotted to 2 groups with 4 replicates per group and 6 pigs per replicate ( half male and half fe-male) . Control group was fed a basal diet and experimental group was fed the basal diet supplemented with 0.1 g/kg Pediococcus acidilactici (1.0×1010 CFU/g). The experiment lasted for 56 days. The results showed that, compared with control group: 1 ) the supplementation of Pediococcus acidilactici had no significant effects on average daily feed intake, average daily gain, feed to gain ratio ( P>0.05) . 2) Glutathione peroxi-dase activity in duodenum, total superoxide dismutase, total antioxidant capacity activity of jejunum, and cata-lase of ileum were significantly increased by the supplementation of Pediococcus acidilactici (P<0.05). 3) The supplementation of Pediococcus acidilactici significantly decreased crypt depth of duodenum, significantly increased mucosal thickness, intestinal thickness and villus height/crypt depth of duodenum (P<0.05); the supplementation of Pediococcus acidilactici significantly decreased crypt depth of jejunum ( P<0.05) , and sig-nificantly increased villus height/crypt depth (P<0.05); the supplementation of Pediococcus acidilactici sig-nificantly increased villus height of ileum ( P<0.05) . 4) The supplementation of Pediococcus acidilactici sig-nificantly increased lactobacillus count and colonization resistance, and significantly decreased E. coli count of jejunum ( P<0. 05 ) . In conclusion, the supplementation of 0. 1 g/kg Pediococcus acidilactici ( 1. 0 × 1010 CFU/g) can improve intestinal microflora and morphological structure, enhance oxidation resistance, and improve the intestinal health of finishing pigs.
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