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RESEARCHERS COMPARE EFFECTIVENESS OF RECOMBINANT INFECTIOUS BURSAL DISEASE VACCINES
Source: U.S. Poultry & Egg Association news release

USPOULTRY and the USPOULTRY Foundation announce the completion of a funded research project at the University of Delaware, Newark, Del., and The Ohio State University, Wooster, Ohio, that compared the effectiveness of recombinant infectious bursal disease vaccines. The project is part of the Association's comprehensive research program encompassing all phases of poultry and egg production and processing.

A brief summary of the completed project is shown below. A complete report, along with information on other Association research, may be obtained by going to USPOULTRY's website, www.uspoultry.org.

The project summary is as follows:
PROJECT #668: STUDIES ON THE EFFICACY OF RECOMBINANT HVT-IBD VACCINES
(Jack Gelb, Jr. and Daral Jackwood, University of Delaware, Newark, Del., and Brian Ladman and Erin Brannick, The Ohio State University, Wooster, Ohio)

In recent years, recombinant infectious bursal disease (IBD) vaccines have been utilized to protect chickens against both Marek's disease and IBD. Researchers at the University of Delaware and The Ohio State University recently completed a research project that compared the ability of two recombinant IBD vaccines to protect chickens against a variety of different IBD viruses found in the United States.

Both vaccines were found to provide better protection in SPF maternal antibody-free white leghorns than in maternal antibody positive broilers. Protection varied against different IBD challenge viruses and differences were seen in the protection afforded by the two vaccines.

Overall, bursal lesion scores in challenged broilers appeared to be lower with the use of one of the vaccines compared to lesion scores in broilers vaccinated with the other vaccine. Four different ELISA kits were evaluated for their ability to detect antibody induced by the recombinant vaccines, and two of the evaluated kits were found to be most effective.

For a detailed summary, visit: http://www.uspoultry.org/research/resproj/PROJ_668.html.


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