Effect of CMHS,MOS and Flavomycin on Growth Performance and Immunization of Laying Chicks

In order to evaluate effects of Chinese medicinal herb(CMH) Mannanoligosaccharides(MOS) and Flavomycin on growth and immunization of laying male chicks,four CMHs which are Schisandra chinensis(SC),Ligustrum Lucidum(LL),Si Jun Zi Tang(SJZT) and Liu Wei Di Huang Wan(LWDHW) were used in this study,which are added to basal diet as 1%,respectively,or basal component and 50 mg/kg MOS,or 5 mg/kg antibiotic,with the basal diet as the control.Results showed that little effects were observed in growth performance of chicks in all trial groups as compared with control.No influences were observed on plasma T_3 and T_4 concentration,and T_3/T_4.Blood samples were taken via wing vein from each bird on the day receiving the vaccination(Day-1) and on 21 d and 28 d after vaccination(Days 0,21 and 28 d).Results demonstrated that contrast to control,these four CMHS used in the present study could significantly increase antibody level,Otherwise,MOS and flavomycin had little effect on antibody level.Suggesting that these four CMHS enhance antibody formation.Lymphoblastogenesis microassay was conducted to evaluate the induction of in vitro lymphocyte proliferation by ConA.Lymphocyte proliferative responses to ConA were greater (P0.01) in group LL.Compared with control,SC,SJZT,LWDHW,MOS and flavomycin increased lymphocyte proliferation too,but no significant differences were observed.