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  • Title: Potential probiotic Lactobacillus plantarum VSG3 improves the growth, immunity, and disease resistance of tropical freshwater fish, Labeo rohita.
    Author: Giri SS, Sukumaran V, Oviya M.
    Journal: Fish Shellfish Immunol; 2013 Feb; 34(2):660-6. PubMed ID: 23274158.
    Abstract:
    The study evaluated the effects of dietary doses of Lactobacillus plantarum VSG3 on the growth performance, immunity, and disease resistance of Labeo rohita juveniles against Aeromonas hydrophila infection. Fish (mean body weight 60 g) were fed with diet containing 0 (control), 10(6), 10(8), 10(10) cfu g(-1)L. plantarum VSG3 for 60 days. Various growth and immune parameters were examined at 30 and 60 days of post-feeding. Fish were challenged with A. hydrophila 60 days post-feeding and mortalities were recorded over 10 days post-infection. Results showed that administration of VSG3 for 60 days had significant effects (P < 0.05) on the specific growth rate (SGR) and feed utilization efficiency of L. rohita. Dietary administration of L. plantarum VSG3 significantly increased the serum lysozyme and alternative complement pathway (ACP) activities, phagocytosis and respiratory burst activity in L. rohita throughout the experimental period. The highest superoxide dismutase (SOD) activity (P < 0.05) was observed in the fish group fed diet containing VSG3 at 10(8) cfu g(-1). The serum IgM levels were significantly higher in the experimental groups compared to the control group after 30 days of feeding; but, the result was opposite after 60 days of feeding. Further, fish fed the diet containing 10(8) cfu g(-1)L. plantarum VSG3 had significantly higher (P < 0.05) post-challenge survival rate (77.7%). These results collectively suggest that dietary supplementation of L. plantarum VSG3 at 10(8) cfu g(-1) to L. rohita is optimal for enhancing the growth, immunity, and disease resistance against A. hydrophila infection.
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