This study was conducted to characterize infectious bursal disease virus (IBDV) isolates

collected from different parts of Iran during 2005-2006. Pooled bursal samples from 49 broiler

and layer pullet flocks ...

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Three isolates demonstrated close relation to classical attenuated strains of IBDVs, and six isolates showed sequences common in

European and Asian strains of very virulent IBDVs (vvIBDVs). Four nucleotide changes—802A, 934A, 940A, and 1366A...