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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine >
Peer-reviewed Journal Articles, etc >
A systematic approach to illuminate a new hot spot of avian influenza virus circulation in South Vietnam, 2016-2017
| Title: | A systematic approach to illuminate a new hot spot of avian influenza virus circulation in South Vietnam, 2016-2017 |
| Authors: | Kien Trung Le Browse this author | | Stevenson, Mark A. Browse this author | | Isoda, Norikazu Browse this author →KAKEN DB | | Lam Thanh Nguyen Browse this author | | Duc-Huy Chu Browse this author | | Tien Ngoc Nguyen Browse this author | | Long Van Nguyen Browse this author | | Tien Ngoc Tien Browse this author | | Tung Thanh Le Browse this author | | Matsuno, Keita Browse this author →KAKEN DB | | Okamatsu, Masatoshi Browse this author →KAKEN DB | | Sakoda, Yoshihiro Browse this author →KAKEN DB |
| Keywords: | avian influenza | | knowledge attitude and practice survey | | poultry delivery station | | Vietnam |
| Issue Date: | 4-Nov-2021 |
| Publisher: | John Wiley & Sons |
| Journal Title: | Transboundary and emerging diseases |
| Volume: | 69 |
| Issue: | 4 |
| Start Page: | e831 |
| End Page: | e844 |
| Publisher DOI: | 10.1111/tbed.14380 |
| Abstract: | In South Vietnam, live bird markets (LBMs) are key in the value chain of poultry products and spread of avian influenza virus (AIV) although they may not be the sole determinant of AIV prevalence. For this reason, a risk analysis of AIV prevalence was conducted accounting for all value chain factors. A cross-sectional study of poultry flock managers and poultry on backyard farms, commercial (high biosecurity) farms, LBMs and poultry delivery stations (PDSs) in four districts of Vinh Long province was conducted between December 2016 and August 2017. A total of 3597 swab samples were collected from birds from 101 backyard farms, 50 commercial farms, 58 sellers in LBMs and 19 traders in PDSs. Swab samples were submitted for AIV isolation. At the same time a questionnaire was administered to flock managers asking them to provide details of their knowledge, attitude and practices related to avian influenza. Multiple correspondence analysis and a mixed-effects multivariable logistic regression model were developed to identify enterprise and flock manager characteristics that increased the risk of AIV positivity. A total of 274 birds were positive for AIV isolation, returning an estimated true prevalence of 7.6% [95% confidence interval (CI): 6.8%-8.5%]. The odds of a bird being AIV positive if it was from an LBM or PDS were 45 (95% CI: 3.4-590) and 25 (95% CI: 1.4-460), respectively, times higher to the odds of a bird from a commercial poultry farm being AIV positive. The odds of birds being AIV positive for respondents with a mixed (uncertain or inconsistent) level and a low level of knowledge about AI were 5.0 (95% CI: 0.20-130) and 3.5 (95% CI: 0.2-62), respectively, times higher to the odd of birds being positive for respondents with a good knowledge of AI. LBMs and PDSs should receive specific emphasis in AI control programs in Vietnam. Our findings provide evidence to support the hypothesis that incomplete respondent knowledge of AI and AIV spread mechanism were associated with an increased risk of AIV positivity. Delivery of education programs specifically designed for those in each enterprise will assist in this regard. The timing and frequency of delivery of education programs are likely to be important if the turnover of those working in LBMs and PDSs is high. |
| Rights: | This is the peer reviewed version of the following article: [Le, K. T., Stevenson, M. A., Isoda, N., Nguyen, L. T., Chu, D.-H., Nguyen, T. N., Nguyen, L. V., Tien, T. N., Le, T. T., Matsuno, K., Okamatsu, M., & Sakoda, Y. (2022). A systematic approach to illuminate a new hot spot of avian influenza virus circulation in South Vietnam, 2016–2017. Transboundary and Emerging Diseases, 69, e831– e844. https://doi.org/10.1111/tbed.14380], which has been published in final form at https://doi.org/10.1111/tbed.14380. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/90176 |
| Appears in Collections: | 獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 磯田 典和
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