Eleven avian paramyxovirus type 6 (APMV-6) isolates from Eurasian Wigeon (n=5; Anas penelope), Mallards (n=2; Anas platyrhynchos), and unknown species of wild ducks (n=4) from Korea were analyzed based on the nucleotide (nt) and deduced amino acid sequences of the fusion (F) gene. Fecal samples were collected in 2010–14. Genotypes were assigned based on phylogenetic analyses. Our results revealed that APMV-6 could be classified into at least two distinct genotypes, G1 and G2. The open reading frame (ORF) of the G1 genotype was 1,668 nt in length, and the putative F0 cleavage site sequence was 113PAPEPRL119. The G2 genotype viruses included five isolates from Eurasian wigeons and four isolates from unknown waterfowl species, together with two reference APMV-6 strains from the Red-necked Stint (Calidris ruficollis) from Japan and an unknown duck from Italy. There was an N-truncated ORF (1,638 nt), due to an N-terminal truncation of 30 nt in the signal peptide region of the F gene, and the putative F0 cleavage site sequence was 103SIREPRL109. The genetic diversity and ecology of APMV-6 are discussed.
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Vol. 54 • No. 3