Effects of Qishen Ultrafine Powder on Immune Effi- cacy in Chickens

摘要

[Objective] This paper aimed to observe the effects of Qishen ultrafine powder on immune efficacy of infectious bursal disease vaccine in chickens.[Method] 360 1-day-old chickens were randomly divided into six groups equally,and group I-V were vaccinated with IBD live virus vaccine on the 21st and 35th day,respectively.From 14th to 21st day,group I-III were added with 1%,0.5% of Qishen ultrafine powder and 2% of Qishen powder in basal diet,respectively,group IV was given Yupingfeng oral liquid and group VI was as a control group without vaccination.Before the experiment (14-day-old chickens as D0) and 7 (D7),14 (D14),21 (D21),28 (D28),35 (D35),42 (D42) days after the experiment,the dynamic change of serum IBD specific antibody was determined,respectively.On D7,D21 and D35,the dynamic change of peripheral T lymphocyte proliferation and IL-2 in serum were determined,respectively.The weight change was also observed.[Results] Compared with the immune control group,the immune effects of IBD vaccine of each administration group were significantly improved,and there was no significant difference between each other.[Conclusion] Qishen ultrafine powder could increase immune function of chickens at lower dosage.