The antigenic profiles of over 300 infectious bursal disease virus (IBDV) isolates were analyzed using a panel of monoclonal antibodies in a reverse genetics system. In addition, the sequences of a large portion of the neutralizing-antibody-inducing VP2 of IBDV were determined. Phylogenetic analysis of nucleotide and amino acid sequences in combination with the antigenic profiles obtained using the monoclonal antibody panel, revealed a lack of correlation between antigenicity and isolate’s placement within the phylogenetic tree. In-depth analysis of amino acid exchanges revealed that changes within a certain region of the VP2 molecule resulted in differences in the antigenicity of the virus. This comprehensive analysis of VP2 sequences indicated a high selective pressure in the field that was likely due to vaccination programs, which increase the rate of evolution of the virus.
Archives of Virology – Springer Journals
Published: Oct 1, 2011
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