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This study was designed to compare four different medicinal plants, cinnamon (Cinnamomum verum), cumin (Cuminum cyminum), fenugreek (Trigonella foenum-graecum) and ginger (Zingiber officinale), as natural feed additives with the Doxystin: “Doxycycline HCl 50 mg and Colistin sulfate” (known antimicrobial growth promoter) on plasma biochemical values of broiler chicks includes total protein, albumin, globulin, albumin/ globulin (A/G) ratio and the Alkaline phosphatase activity. Two hundred and forty, (one day-old) broiler chicks were randomly assigned to six groups of similar mean weight each included four replicates of ten chicks. The control group received broilers basal diet. For the treated groups, the basal diet was supplemented with one of the following: the antimicrobial (Doxystin) as 0.5% or one of the spices C. verum, C. cyminum, T. foenum-graecum and Z. officinale as 2%. The results showed significant (P |
