Antibodies to flaviviruses in wild ducks captured in Hokkaido, Japan: Risk assessment of invasive flaviviruses
Recently, the distribution of Japanese encephalitis virus (JEV) and West Nile virus (WNV) has expanded into new territories. The invasion of WNV into Japan is of great concern. The migration of birds is suggested to be involved in the expanded distribution of these flaviviruses. In this study, 92 wi...
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Mary Ann Liebert
2009
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ftrakunogakuenun:oai:rakuno.repo.nii.ac.jp:00002041 2023-05-15T13:24:49+02:00 Antibodies to flaviviruses in wild ducks captured in Hokkaido, Japan: Risk assessment of invasive flaviviruses Saito Mika Osa Yuichi Asakawa M 2009-06 https://rakuno.repo.nii.ac.jp/?action=repository_uri&item_id=2041 http://hdl.handle.net/10659/1832 https://rakuno.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2041&item_no=1&attribute_id=21&file_no=1 en eng Mary Ann Liebert 10.1089/vbz.2008.0111 https://rakuno.repo.nii.ac.jp/?action=repository_uri&item_id=2041 http://hdl.handle.net/10659/1832 Vector borne and zoonotic diseases, 9(3), 253-258(2009-06) 1530-3667 https://rakuno.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2041&item_no=1&attribute_id=21&file_no=1 Journal Article Article 2009 ftrakunogakuenun 2023-01-23T21:04:31Z Recently, the distribution of Japanese encephalitis virus (JEV) and West Nile virus (WNV) has expanded into new territories. The invasion of WNV into Japan is of great concern. The migration of birds is suggested to be involved in the expanded distribution of these flaviviruses. In this study, 92 wild ducks—20 Anas poecilorhyncha (migratory breeders), 50 Anas platyrhynchos (undetermined), 16 Anas acuta (winter visitors), and 6 Anas penelope (winter visitors)—were captured in autumn of 2005 and 2006, in the central part of Hokkaido, a low JEV activity area. A seroepidemiologic analysis of flavivirus infections was conducted with 90% and 50% focus reduction neutralization tests (FRNT_<90> and FRNT_<50>). Of the 92 serum samples, 1 (1.1%) and 5 (5.4%) tested positive for WNV-specific and JEV-specific antibodies, respectively, in the FRNT90, and 61 (66.3%) and 79 (85.9%) tested positive for WNV and JEV, respectively, in the FRNT50. These results indicate that wild ducks in this study had been exposed to flaviviruses. The results together with the recognized distribution of flaviviruses and migratory routes of individual duck species strongly suggested that the birds captured in this study had been exposed to flaviviruses, including WNV, on the flyway, not in Hokkaido. Article in Journal/Newspaper Anas acuta Rakuno Gakuen University: CLOVER |
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Rakuno Gakuen University: CLOVER |
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ftrakunogakuenun |
language |
English |
description |
Recently, the distribution of Japanese encephalitis virus (JEV) and West Nile virus (WNV) has expanded into new territories. The invasion of WNV into Japan is of great concern. The migration of birds is suggested to be involved in the expanded distribution of these flaviviruses. In this study, 92 wild ducks—20 Anas poecilorhyncha (migratory breeders), 50 Anas platyrhynchos (undetermined), 16 Anas acuta (winter visitors), and 6 Anas penelope (winter visitors)—were captured in autumn of 2005 and 2006, in the central part of Hokkaido, a low JEV activity area. A seroepidemiologic analysis of flavivirus infections was conducted with 90% and 50% focus reduction neutralization tests (FRNT_<90> and FRNT_<50>). Of the 92 serum samples, 1 (1.1%) and 5 (5.4%) tested positive for WNV-specific and JEV-specific antibodies, respectively, in the FRNT90, and 61 (66.3%) and 79 (85.9%) tested positive for WNV and JEV, respectively, in the FRNT50. These results indicate that wild ducks in this study had been exposed to flaviviruses. The results together with the recognized distribution of flaviviruses and migratory routes of individual duck species strongly suggested that the birds captured in this study had been exposed to flaviviruses, including WNV, on the flyway, not in Hokkaido. |
format |
Article in Journal/Newspaper |
author |
Saito Mika Osa Yuichi Asakawa M |
spellingShingle |
Saito Mika Osa Yuichi Asakawa M Antibodies to flaviviruses in wild ducks captured in Hokkaido, Japan: Risk assessment of invasive flaviviruses |
author_facet |
Saito Mika Osa Yuichi Asakawa M |
author_sort |
Saito Mika |
title |
Antibodies to flaviviruses in wild ducks captured in Hokkaido, Japan: Risk assessment of invasive flaviviruses |
title_short |
Antibodies to flaviviruses in wild ducks captured in Hokkaido, Japan: Risk assessment of invasive flaviviruses |
title_full |
Antibodies to flaviviruses in wild ducks captured in Hokkaido, Japan: Risk assessment of invasive flaviviruses |
title_fullStr |
Antibodies to flaviviruses in wild ducks captured in Hokkaido, Japan: Risk assessment of invasive flaviviruses |
title_full_unstemmed |
Antibodies to flaviviruses in wild ducks captured in Hokkaido, Japan: Risk assessment of invasive flaviviruses |
title_sort |
antibodies to flaviviruses in wild ducks captured in hokkaido, japan: risk assessment of invasive flaviviruses |
publisher |
Mary Ann Liebert |
publishDate |
2009 |
url |
https://rakuno.repo.nii.ac.jp/?action=repository_uri&item_id=2041 http://hdl.handle.net/10659/1832 https://rakuno.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2041&item_no=1&attribute_id=21&file_no=1 |
genre |
Anas acuta |
genre_facet |
Anas acuta |
op_relation |
10.1089/vbz.2008.0111 https://rakuno.repo.nii.ac.jp/?action=repository_uri&item_id=2041 http://hdl.handle.net/10659/1832 Vector borne and zoonotic diseases, 9(3), 253-258(2009-06) 1530-3667 https://rakuno.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2041&item_no=1&attribute_id=21&file_no=1 |
_version_ |
1766381860561092608 |