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Researchers' work from Ohio State University focuses on vaccines

Published in Vaccine Weekly, July 23rd, 2008

New investigation results, 'Studies on naturally occurring infectious bursal disease viruses suggest that a single amino acid substitution at position 253 in VP2 increases pathogenicity,' are detailed in a study published in Virology. According to recent research from the United States, "Three classic IBDV strains were previously isolated from commercial layer chicken flocks and shown to be phylogenetically related to vaccine strains but pathogenic in susceptible chickens. In this study, their viral genomes were sequenced and compared to sequences of vaccines being used in those flocks."

"The vaccine strains examined were sequenced directly from the manufacturer...

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