Enhancement of immunity and disease resistance in the white shrimp, Litopenaeus vannamei, by the probiotic, Bacillus subtilis E20
| Autor: | Deng-Yu Tseng, Chiu-Shia Chiu, Chun-Hung Liu, Sung-Yan Huang, Pei-Lin Ho, Ya-Li Shiu, Sheng-Chi Cheng |
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| Rok vydání: | 2008 |
| Předmět: |
Hemocytes
Litopenaeus Vibrio vulnificus Bacillus subtilis Aquatic Science Biology law.invention Microbiology Probiotic Fish Diseases Penaeidae Phagocytosis law Environmental Chemistry Animals Respiratory Burst chemistry.chemical_classification Vibrio alginolyticus Glutathione Peroxidase Monophenol Monooxygenase Superoxide Dismutase Glutathione peroxidase Probiotics fungi General Medicine biology.organism_classification Survival Analysis Immunity Innate Shrimp Respiratory burst Diet chemistry |
| Zdroj: | Fishshellfish immunology. 26(2) |
| ISSN: | 1095-9947 |
| Popis: | Effects of Bacillus subtilis E20 isolated from fermented soybean on immune parameters and the disease resistance of the white shrimp (Litopenaeus vannamei) after 98 days of B. subtilis E20 feeding were evaluated in this study. Shrimp fed B. subtilis E20-containing diets at concentrations of 106 (E206), 107 (E207), and 108 (E208) cfu kg−1, respectively, had significantly increased survival rates of 13.3%, 16.7%, and 20%, compared to the control (fed no probiotic) after being challenged with Vibrio alginolyticus. There were no significant differences in the total hemocyte count, respiratory burst, or superoxide dismutase glutathione peroxidase among all treatments. Shrimp fed a higher concentration of the probiotic (E208) exhibited significant increases in phenoloxidase activity, phagocytic activity, and clearance efficiency compared to control shrimp. In addition, B. subtilis E20 showed a weaker inhibitory effect against the growth of Aeromona hydrophila with around a 0.3-cm inhibitory zone, but showed no inhibitory effects against other selected pathogens, such as white shrimp pathogens: V. alginolyticus and Vibrio vulnificus. These results suggest that the increased resistance of shrimp after B. subtilis E20 consumption occurs through immune modifications, such as increases in phenoloxidase activity, phagocytic activity, and clearance efficiency against V. alginolyticus. |
| Databáze: | OpenAIRE |
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