الفهرس 
The avian immune systemOnly 14 pages are availabe for public view
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Abstract
The present study was carried out at the Poultry Research Farm, Department of Poultry Production, Faculty of Agriculture at Shibin El-Kom, Minufiya University, Egypt. The experiments were extended during the years of 2008 and 2009.A total of 320 individuals of Norfa chickens from both males and females were used in the present experiment as base stock. At 20 weeks of age, the primary antibody response to SRBC antigen was determined for each individual at 7 days post-immunization. Chickens were divided into three groups based on the level of primary antibody titers as follows: Control group (CR):
Chickens of control group were taken at random from the base stock, which contained 40 chickens from both sexes (20 males and 20 females). High immune response group (HR): The highest 20 males and the highest 20 females in the level of antibody titers were taken from the base stock to form the high immune response group.