Genetic Analysis of an H5N2 Highly Pathogenic Avian Influenza Virus Isolated          from a Chicken in a Live Bird Market in Northern Vietnam in 2012

Tatsuya NISHI; Masatoshi OKAMATSU; Kenji SAKURAI; Huy Duc CHU; Long Pham THANH; Long van NGUYEN; Nam van HOANG; Diep Nguyen THI; Yoshihiro SAKODA; Hiroshi KIDA

doi:10.1292/jvms.13-0311

Virology

Genetic Analysis of an H5N2 Highly Pathogenic Avian Influenza Virus Isolated from a Chicken in a Live Bird Market in Northern Vietnam in 2012

Tatsuya NISHI, Masatoshi OKAMATSU, Kenji SAKURAI, Huy Duc CHU, Long Pham THANH, Long van NGUYEN, Nam van HOANG, Diep Nguyen THI, Yoshihiro SAKODA, Hiroshi KIDA

Author information

Tatsuya NISHI
Laboratory of Microbiology, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060–0818, Japan
Masatoshi OKAMATSU
Laboratory of Microbiology, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060–0818, Japan
Kenji SAKURAI
OIE Regional Representation for Asia and the Pacific, Food Science Building 5F, The University of Tokyo, Tokyo 113–8657, Japan
Huy Duc CHU
Ministry of Agriculture and Rural Development, 15/78 Giaiphong, Phuongmai, Dongda, Hanoi, Vietnam
Long Pham THANH
Ministry of Agriculture and Rural Development, 15/78 Giaiphong, Phuongmai, Dongda, Hanoi, Vietnam
Long van NGUYEN
Ministry of Agriculture and Rural Development, 15/78 Giaiphong, Phuongmai, Dongda, Hanoi, Vietnam
Nam van HOANG
Ministry of Agriculture and Rural Development, 15/78 Giaiphong, Phuongmai, Dongda, Hanoi, Vietnam
Diep Nguyen THI
Ministry of Agriculture and Rural Development, 15/78 Giaiphong, Phuongmai, Dongda, Hanoi, Vietnam
Yoshihiro SAKODA
Laboratory of Microbiology, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060–0818, Japan
Hiroshi KIDA
Laboratory of Microbiology, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060–0818, Japan
Research Center for Zoonosis Control, Hokkaido University, Sapporo 001–0020, Japan

Keywords: avian influenza, H5N2, live bird market, reassortant, Vietnam

JOURNAL FREE ACCESS

2014 Volume 76 Issue 1 Pages 85-87

DOI https://doi.org/10.1292/jvms.13-0311

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Abstract

In August 2012, A/chicken/Vietnam/OIE-2215/2012 (H5N2) was isolated from a chicken in a live bird market (LBM) in Northern Vietnam. Intravenous pathogenicity test revealed that this virus is highly pathogenic in chickens. The PA, HA, NP and M, PB2 and NA, and PB1 and NS genes of the isolate were phylogenetically closely related to those of A/duck/Vietnam/OIE-2202/2012 (H5N1) of clade 2.3.2.1, A/chicken/Vietnam/OIE-1611/2012 (H9N2) and A/chicken/Vietnam/OIE-2468/2012 (H9N2), respectively. All of these viruses were isolated from birds in LBMs in the same province. These results indicate that A/chicken/Vietnam/OIE-2215/2012 (H5N2) is a genetic reassortant and that surveillance of avian influenza in LBMs and stamping out policy are essential for the eradication of highly pathogenic avian influenza viruses from Asia.

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