الفهرس 
Title : A trial for production of bivalent vaccine of riemerella anatipestifer and escherichia coli in ducks
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Abstract
The present work was planned to study the immune response of ducks vaccinated with locally prepared bivalent inactivated vaccine of R. anatipestifer and E.coli adjuvanted with Montanide ISA71. One hundred (100) Pekin ducklings one day-old apparently healthy were divided into five groups, the 1st group was vaccinated with R. anatipestifer vaccine, the 2nd group was vaccinated with E.coli vaccine, the 3rd group was vaccinated with bivalent E.coli- R. anatipestifer vaccine, the 4th group and the 5th group were kept unvaccinated as a control group.The prepared vaccines were evaluated by evaluation of the humoral immunity by indirect hemagglutination and ELISA techniques.The potency of the vaccines was evaluated by the challenge test.The results showed that bivalent inactivated vaccine of E.coli- R. anatipestifer adjuvanted with Montanide ISA71 induced high and long duration of antibody response and significant protection against the challenge with virulent strains of R. anatipestifer and E.coli in vaccinated ducks