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The Effect of Threonine and Vitamin A on Immune System in Broiler Chickens
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نویسنده
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Sepehri Moghaddam Heshmat ,Emadi Mozhdeh
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منبع
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International Journal Of Advanced Biological And Biomedical Research - 2014 - دوره : 2 - شماره : 3 - صفحه:756 -763
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چکیده
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Two independent experiments were conducted with broilers to determine the effect of threonine and vitamin a on immune system. in first experiment, dietary treatments contained 0.8%, 0.87%, 0.94 % and 1.01 % total threonine. in second experiment, diets were as follows: basal diet without vitamin a; basal diet plus 1500 iu/kg vitamin a; basal diet plus 6250 iu/kg vitamin a; basal diet plus 11000 iu/kg vitamin a. fourteen days after feeding the treatments, cutaneous basophil hypersensitivity, cell-mediated immune response, was determined as the increase in toe-web skin thickness after an injection with phytohemagglutinin-p and twenty-two days after feeding the diets, heterophils and lymphocytes were enumerated. humoral immunity was assessed by intravenous injection of 7% sheep red blood cell at 22 days of age. in first experiment, the titers of immunoglobulin for responses were numerically, but not significantly, increased in birds fed diet containing 0.87 % threonine and decreased in 0.94% and 1.01% threonine. cutaneous basophil hypersensitivity was not affected in chicks, whereas there was a tendency for an increase in birds fed a diet containing 0.87 % threonine at 24 h after injection. in second experiment, the titers of immunoglobulin for responses were significantly increased in birds fed diet containing vitamin a. cutaneous basophil hypersensitivity was also increased by addition vitamin a in the diet. the results obtained on the present study indicated that threonine and vitamin a requirements of broiler based on recommendation of national research council are not sufficient to meet the requirement of the new commercial poultry.
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کلیدواژه
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Threonine ,Vitamin A ,Cutaneous Basophil Hypersensitivity ,Hematological Profile ,Broiler
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آدرس
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Payam Noor University, Department Of Agricultural Science, ایران, Payam Noor University, Department Of Agricultural Science, ایران
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Authors
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