Document Type : Research Paper
Authors
1
M.Sc. Student, Department of Animal Science, Faculty of Agricultural Science & Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
2
Assistant Professors, Department of Animal Science, Faculty of Agricultural Science & Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
3
Professor, Department of Animal Science, Faculty of Agricultural Science & Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
4
Assistant Professor, Department of Animal Science, Faculty of Agricultural Science & Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
Abstract
This experiment was conducted to determin the effect of 25(H)D3 and K3 vitamins on immune system of Ross 308 broiler chicken in a completely randomized design with a 3×4 factorial arrangement with four replicates and 16 observation per replicate. Treatments included vitamine D3 (0, 0.4, 0.6 and 0.8 μg) and vitamin K3 (0, 2 and 6 μg). On day 180 g incubation 0.5 ml of treatment solution was injucted in fertile eggs. Male chicken were reared in experiment cages for a period of 42 days. To evaluate humoral immune system reaction 0.5 ml SRBC (10%) was injected on chickens’ breast muscle at the 28th and 35th day, thereafter chicken blood samples were taken on the 35th and 42nd day. In order to evaluate the cellular immune system reaction, Phyto-hemagglutinin (PHA) was injected in the curtain chickens toe on day 24 of rearing period and skin response were studied on 1 and 5 days after injection. The results showed that with increasing levels of vitamin K3, antibody titers against Newcastle were increased (P<0.05). Treatment of increased 0.4 μg and 6 μg K3 in antibody levels to SRBC and IgG significantly and showed the maximum stimulation to PHA injection and treatment 12 with 6 μg K3 and 0.8 μg D3 showed the lowest amount of stimulation (p<0.05). Finally, it can be concluded that 0.4 μg vit D3 and 6 μg vit K3 can improve cellular and humoral immune response in broiler chickens.
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