Vol. 11, Issue 6 (2022)

120 numbers of day old sex separated broiler chicks were wing banded, weighed and randomly allotted to six treatment groups with two replicates of ten chicks each. The treatment groups consisted of group I [basal diet]; group 2[basal diet + Withania somnifera 0.5% extract], group 3[basal diet+Withania somnifera 1% extract], group 4 [basal diet+ cyproheptadine 1mg /kg] group 5 [basal diet + cyproheptadine 1mg /kg+ Withania somnifera 0.5% extract] group 6 [basal diet + cyproheptadine 1mg/kg + Withania somnifera 1% extract]. Antibodies titers against ND were significantly higher in all treatment groups as compared to the values shown by the broilers in control group. Findings of this study indicated that administration of Withania somnifera root powder to broiler chickens improve their immunological status.