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Effect of probiotics, Enteroccus faecium, on tilapia (Oreochromis niloticus) growth performance and immune response |
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| Authors: | Yan-Bo Wang Zi-Qiang Tian Jiang-Tao Yao Wei-fen Li |
| Affiliation: | aAnimal Science College, Zhejiang University, the Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310029, PR China bFood Quality & Safety Department of Zhejiang Gongshang University, Hangzhou, 310035, PR China cChinese Research Academy of Environmental Sciences, River and Coastal Environment Research Center, 100012, Beijing, PR China |
| Abstract: | The aim of this study was to analyze the effect of a probiotic bacterium, Enterococcus faecium ZJ4 on growth performances and immune responses of tilapia (Oreochromis niloticus). The tilapias were treated with E. faecium ZJ4 at a final concentration of 1 × 107 cfu ml− 1 in aquaria water every 4 days. Six aquaria with three replicates for treated and controls were used. After 40 days, the tilapias supplemented with the probiotic showed significantly better final weight and daily weight gain (DWG) than those fed the basal diet (Control) (P < 0.05). There was no remarkable difference (P > 0.05) in the total serum protein, albumin content, globulin concentration and A/G ratio between the treated and control tilapias. The result of lysozyme activity assay was similar to these biochemical indexes. However, the complement component 3 content, myeloperoxidase (MPO) activity and the respiratory burst activity of blood phagocytes were higher (P < 0.05) in E. faecium treated tilapias (trial 1) than the controls. |
| Keywords: | Probiotic Enterococcus faecium Tilapia Oreochromis niloticus |
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