Surveillance and characterization of avian influenza viruses from migratory water birds in eastern Hokkaido, the northern part of Japan, 2009-2010.

TitleSurveillance and characterization of avian influenza viruses from migratory water birds in eastern Hokkaido, the northern part of Japan, 2009-2010.
Publication TypeJournal Article
Year of Publication2013
AuthorsAbao LNB, Jamsransuren D, Bui VN, Ngo LH, Trinh DQ, Yamaguchi E, Vijaykrishna D, Runstadler J, Ogawa H, Imai K
JournalVirus Genes
Volume46
Issue2
Pagination323-9
Date Published2013 Apr
ISSN1572-994X
KeywordsAnimal Migration, Animals, Animals, Wild, Birds, Chickens, Ducks, Feces, Influenza A virus, Influenza A Virus, H3N8 Subtype, Influenza A Virus, H5N2 Subtype, Influenza A Virus, H9N2 Subtype, Influenza in Birds, Japan, Molecular Sequence Data, Phylogeny, Population Surveillance, Poultry Diseases, Viral Matrix Proteins
Abstract

<p>Avian influenza virus (AIV) surveillance was conducted around a small pond in Obihiro, eastern Hokkaido, Japan. Eleven AIVs were isolated from a total of 1,269 fecal samples of migratory wild birds collected during 2009 and 2010. The sample number covered approximately 60 % of the total number of birds observed during sampling periods. The subtypes of the isolates included H3N8 (4 isolates), H5N2 (3), H6N2 (2), H6N1 (1), and H11N2 (1). The H3N8 subtype was most prevalent as in the previous studies performed in Hokkaido. The three H5N2 isolates genetically characterized as low pathogenic AIV were closely related to the strains previously isolated from aquatic wild birds in Japan and also to the Korean strains isolated from aquatic birds in recent years. In Korea, H5N2 subtype virus has often been isolated from poultry and wild birds, as well as reassortant viruses generated from duck H5N2 viruses and chicken H9N2 virus, and avian-swine-like reassortant H5N2 viruses. Considering the previous chicken outbreaks caused by highly pathogenic H5N2 viruses, which affected many countries, it should be an important priority to continue, monitoring the evolution of H5N2 viruses circulating in the region.</p>

DOI10.1007/s11262-012-0868-9
Alternate JournalVirus Genes
PubMed ID23264106
Grant List266200700007C / / PHS HHS / United States
266200700009C / / PHS HHS / United States