Duck hepatitis was first reported in 1985 in Korea. The complete nucleotide sequence of two past Korean isolates, DHV-HS and DHV-HSS, isolated in 1994 and 1995, and four recent Korean isolates, AP-03337, AP-04009, AP-04114 and AP-04203 isolated in 2003 and 2004, were determined. Phylogenetic analysis using the 3D protein sequence confirmed that the previously characterized duck hepatitis virus type 1 strains and the six Korean isolates described here constitute a monophyletic group and form two clades/genotypes in which all except the four recent Korean isolates form one group (A) and the recent Korean isolates of 2003 and 2004 constitute a second group (B). Phylogenetic analysis of the VP1 protein supported the division into two different groups. Antisera raised against viruses of group A showed significant neutralizing cross-reaction against a member of the same genotype but not to a strain of group B and vice versa. These results demonstrated that the two genotypes also could be regarded as two different serotypes.
Archives of Virology – Springer Journals
Published: Oct 1, 2007
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