Histopathological and immune response against infectious bursal disease in chickens vaccinated against Newcastle disease

الملخص EN

Two different vaccination programs against chicken infectious bursal disease (IBD) were compared.

Results showed the first program including IBD vaccination at 8 and 16th day old as well as ND vaccination(live attenuated and inactivated types ) give high antibody titers at 21 days post vaccination with significantly difference (P≤0.0005) in comparison with the second program including only IBD vaccine .

serological antibodies titer were determined to study the correlation between two different programs using ELISA test.

pathological changes in vaccinated groups reveals mild & moderate lesions appear in liver, spleen and bursa of fabricius.