Abstract
This study reports the prevalence of duck hepatitis A virus (DHAV) types 1 and 3 on Korean duck farms. By RT-nested PCR assays specific for DHAV-1 or DHAV-3, DHAV-1 was detected in 9 of 157 liver samples (5.7 %) from 2 of 30 farms (6.7 %), and DHAV-3 was positive in 104 of 157 liver samples (66.2 %) from 23 of 30 farms (76.7 %). Dual infections with DHAV-1 and DHAV-3 were detected in 23 of 157 samples (14.6 %) from 5 of 30 farms (16.7 %). The data indicate that DHAV-3 infections are prevalent and that DHAV-1 reemerged in Korea, resulting in dual infections on several farms. Our data will help to establish a vaccination policy against DHAV-1 and DHAV-3 in Korea.
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This study was supported by a grant from the Korea Basic Science Institute (C33730) and Chonnam National University (2012), Republic of Korea.
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M. Soliman and M. M. Alfajaro contributed equally to this paper.
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705_2014_2264_MOESM1_ESM.tif
Supplementary Fig. 1 Genomic structure of duck hepatitis A virus (DHAV). The figure depicts the location of each primer pair specific for the VP1 region of DHAV-1 or DHAV-3 used for detection and/or sequencing. (TIFF 966 kb)
705_2014_2264_MOESM2_ESM.tif
Supplementary Fig. 2 Phylogenetic trees based on the partial nucleotide (A) and deduced amino acid (B) sequences of the VP1 region of 32 Korean DHAV-1 isolates, indicating their genetic relationships to other known DHAV strains or isolates. Trees were generated using the neighbor-joining method with 1000 bootstrapping replicates in the MEGA 5.1 program. The bar indicates the genetic distance, and the black circle indicates the Korean isolates. Other known reference DHAV-2 and 3 strains listed in Supplementary Table 4 are replaced by triangles, in which the height of the triangle represents the number of sequences, and the width represents the genetic diversity inside the cluster. (TIFF 5531 kb)
705_2014_2264_MOESM3_ESM.tif
Supplementary Fig. 3 Phylogenetic trees based on the partial nucleotide (A) and deduced amino acid (B) sequences of the VP1 region of 83 Korean DHAV-3 isolates, indicating their genetic relationships to other known DHAV strains or isolates. Trees were generated using the neighbor-joining method with 1000 bootstrapping replicates in the MEGA 5.1 program. The bar indicates the genetic distance, and the black square indicates the Korean isolates. Other known reference DHAV-1 and 2 strains listed in Supplementary Table 5 are replaced by triangles, in which the height of the triangle represents the number of sequences, and the width represents the genetic diversity inside the cluster. (TIFF 13936 kb)
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Soliman, M., Alfajaro, M.M., Lee, MH. et al. The prevalence of duck hepatitis A virus types 1 and 3 on Korean duck farms. Arch Virol 160, 493–498 (2015). https://doi.org/10.1007/s00705-014-2264-3
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DOI: https://doi.org/10.1007/s00705-014-2264-3