Safarizadeh A., Zakeri A.and Taghinedjad M
A total of 96 one day-old Ross 308 chickens, divided, in to 12 groups (3 treatment with 4 replicate in a same environmental conditions. Group A, was control group and group B and C were experimental groups. From first day, vitamin A premix was added to group B diets and complex of vitamin E premix and selenium was added to group C diets. Blood sampling accomplished in 3 period , first period was at 9th day of breeding period, second period was at 2 weeks after first period and last sampling period was at 42nd day of breeding period. For Humoral Immunity (HI) and serum level of vitamin A and E and selenium test, 2 ml blood was derived from any chickes. Obtained results from HI test, showed that HI level against newcashe disease vaccine had significant difference in vitamin A and E and selenium group versus control group (p<0.05). So presumed that vitamin A and complex of vitamin E and selenium develop HI in broiler chickens
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