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To determine the effect of using thyme and oregano powder supplementation on performance, some immune response and intestinal morphology of broiler chicks a total of 200 one-day-old Cobb 500 male broiler chicks were divided into the four treatments consisting of five replicates of 10 chicks each. The treatments were as control groups with no herbal, antibiotic and probiotic supplementations. control groups + virginiamycine antibiotic, control groups + protexin probiotic, control groups + 2 % of each thyme and oregano powder supplementation and Control groups + 4 % of each thyme and oregano powder supplementation. The performance parameters such as feed intake, body weight gain and feed conversion ratio were measured during the study period. To determine immunity parameters on days 28, 0.5 mL of 10 % sheep red blood cells suspension was administrated to two chicks per each replicate through and at day 31, 3 mL blood samples were collected from left wing. On day 42, jejunum tissue samples were separated and fixed in (10 %) neutral buffer formalin and were analyzed by autoprocessing apparatus, there after the slide sections were prepared by rotary microtome type (Manubeni, ErmaTokyo, Japan) and the average of villi measurements was reported as a mean for each bird. The result of this study showed that the dietary inclusion of herbals and probiotic had no significant effects on FI and FCR of broiler chicks but higher body weight gain were seen with they received thyme+oregano supplementation. Inclusion of thyme+oregano and probiotic increased humeral immunity in broiler chicks compared to the control (P ≤ 0.05). Additionally heterophil, lymphocyte and their ratio were not influenced by experimental treatments. The villus length, villus width, and crypt depth were increased were the birds feed by oregano and thyme powders. In conclusion in current study some of beneficial acts toward using thyme and oregano powders on performance, some immune parameters and intestinal morphology on broiler chicks were demonstrated.

ukrainian journal of veterinary and agricultural sciences

Evaluation the effect of using thyme and oregano powder in comparison to the antibiotic and probiotic supplementation on growth, some immune responses and intestinal morphology of broiler chicks