Application of Neoagaro-oligosaccharides as Immunostimulants in Abalone Production
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Abstract:
In this study, the activity of neoagaro-oligosaccharides as a new immunostimulant was studied by adding different dosages of Neoagaro-oligosaccharides in the feed (0.1%, 0.5%, 1%, 1.5% and 3%, respectively). Then, determination of serum complement activity, lysozyme activity, phagocytic activity and the total number of leucocytes was carried out to decide the impact of neoagaro-oligosaccharides on abalone non-specific immunity. Besides, the abalone were injected peritoneally with Aeromonas hydrophila after fed 3 months for determine the effect of neoagaro-oligosaccharides on the disease resistance. The results showed that the serum complement activity, lysozyme activity, phagocytic activity and the total number of leucocytes of the groups of adding neoagaro-oligosaccharides in the feed were significantly higher than that of the control group. The best dosage of the Neoagaro-oligosaccharides in the feed was between 0.5% and 1%. The results of the bacterial infection test showed that the survival rate of neoagaro-oligosaccharides feeding group was significantly higher than that of the control group.
