Effects of Taishan Robinia pseudoacacia Polysaccharides on immune function in chickens

•We extracted 3 different doses of TRPPS (Taishan Robinia pseudoacacia Polysaccharide).•We examined the effects of immunological enhancement of TRPPS on immunized chickens.•TRPPS possesses fairly good economic and practical value based on an overall consideration of many factors.

To determine the immune function of Taishan Robinia pseudoacacia Polysaccharide (TRPPS) on chickens, 240 chickens were selected as experimental animals and treated with various doses of TRPPS by hypodermic injection before immunized NDV inactivated vaccine. The results indicated that any dose of TRPPS could significantly promote the development of the immune organs, increase the quantity of leukocyte and the ratio of lymphocyte, and improve the antibody titers against Newcastle disease. Meanwhile, it also increased the magnitude of SIgA in duodenum. However, the dose of 200 mg/ml showed to be the most effective. Therefore, in terms of improving immunologic function and production performance, TRPPS could be used as a vaccine immunopotentiator for immune responses.