Effects of Lanerkang-A on Immune Function of PRRS Vaccines and Performance Indicators of Piglets

[Objective]To study the effects of Lanerkang-A on the immunity and production efficiency of piglets and lay a base for the development of green medicine on immunity stimulator.[Method] A total of 50 healthy piglets were randomly divided into two groups,namely,the control group(Group I),test group(Group II),25 pigs every group.All the piglets were intramuscular injected with 2 ml porcine reproductive and respiratory syndrome(PRRS) propolis inactivated vaccine at 25 days old.The piglets in Group II were fed with feed containing Lanerkang-A(10 ml/kg) at the 42 days old.After 7 days feeding,the antibody titer against PRRS and the cytoimmunity were detected using ELISA and E-rosette,respectively.[Result] Lanerkang-A improved 4 titers of antibody against PRRS and increased E-rosette forming rate by 7%.The average daily weight gain increased by 15.68%.[Conclusion] Lanerkang-A can greatly improve the immune function,increase the daily gain of piglets,as well as improve their production performance.