“…Newcastle disease virus (NDV), a member of the genus Avulavirus within the family Paramyxoviridae , has a negative-sense, single-stranded, nonsegmented RNA genome with three sizes (15,186, 15,192, and 15,198 nucleotides [nt]) and encodes at least six viral proteins (1, 2). On the basis of the genomic size and cleavage site motif of the F protein, NDVs can be divided into two distinct classes, I and II.…”