الفهرس 
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Abstract
The aim of the present work is to evaluate the immunological response of prepared local inactivated combined pentavalent (S. enteriditis , A.paragallinarum, Newcastle disease virus, Infectious Bronchitis and egg DROP syndrome) vaccines in comparison with the imported inactivated pentavalent vaccine. from this study it was found that: 1. Results of haemagglutination inhibition (HI) test for Newcastle disease titers in sera of chicken vaccinated with one field dose of both local and imported inactivated polyvalent penta vaccines revealed that the HI antibody titers in serum of chickes vaccinated with imported inactivated polyvalent penta vaccine increased from (0 log2) at prevaccination time till reached the maximum level (8 log2) at 6th week post vaccination (WPV) 2. The results of EDS component of the local and imported inactivated polyvalent penta vaccines using HI test showed that these was increase in HI antibody titers from (0log2) at prevaccination time till reached the maximum level (8.1log2) at the 6th WPV in case of chicken groups vaccinated with the imported vaccine. But it could be deduced that the local prepared vaccine evoked an increase in HI antibody titers till reach the maximum level (8.1 log2) at the 5th WPV and persist till the 6th WPV. 3. The results of IB component of the local and imported inactivated polyvalent penta vaccines using ELISA that showed that the titer values increased gradually from (156.2) level before vaccination and reached to 6268.6 and 6366.8 among local and imported inactivated polyvalent penta vaccines at the 6th WPV as regards to the control group the titer level increased with low values due to the increase in age.
4. The results of SE component of the local and imported inactivated polyvalent penta vaccines using ELISA test revealed that the titer of antibody increased from 156.2 before vaccination till reaching the maximum level which was 2464.9 in case of the local inactivated polyvalent penta vaccine and 2587.6 in case of the imported one at the 6 th weeks post