Abstract:Hyperimmunized egg yolk (HIY) was produced in two layer hens by four successive immunization with live attenuated Newcastle disease vaccine (NDV) by seven days intervals for each vaccination process. Fifty broiler chicks were used for treatment with hyperimmunized yolk. They were divided into five groups. The first group was treated at 14th days of age by orally and intramuscular injection (five chicken for each route). The second group was boostered with (HIY) after 7 days of first dose at14 days of age. The … Show more
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