Preventive effect of on-farm biosecurity practices against highly pathogenic avian influenza (HPAI) H5N6 infection on commercial layer farms in the Republic of Korea during the 2016-17 epidemic: A case-control study

2022 ◽  
Vol 199 ◽  
pp. 105556
Author(s):  
Dae-sung Yoo ◽  
Kwang-nyeong Lee ◽  
Byung-Chul Chun ◽  
Ho-sung Lee ◽  
Hyuk Park ◽  
...  
Keyword(s):  
Case Control Study ◽  
Highly Pathogenic Avian Influenza ◽  
Preventive Effect ◽  
Highly Pathogenic ◽  
Pathogenic Avian Influenza ◽  
The Republic ◽  
Biosecurity Practices ◽  
On Farm ◽  
Farm Biosecurity ◽  
Control Study

scholarly journals Elucidating the Local Transmission Dynamics of Highly Pathogenic Avian Influenza H5N6 in the Republic of Korea by Integrating Phylogenetic Information

Pathogens ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 691
Author(s):  
Dae-Sung Yoo ◽  
Byungchul Chun ◽  
Kyung-Duk Min ◽  
Jun-Sik Lim ◽  
Oun-Kyoung Moon ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Highly Pathogenic Avian Influenza ◽  
Transmission Dynamics ◽  
Republic Of Korea ◽  
Transmission Risk ◽  
Highly Pathogenic ◽  
Pathogenic Avian Influenza ◽  
The Republic ◽  
The Impact ◽  
Local Transmission

Highly pathogenic avian influenza (HPAI) virus is one of the most virulent and infectious pathogens of poultry. As a response to HPAI epidemics, veterinary authorities implement preemptive depopulation as a controlling strategy. However, mass culling within a uniform radius of the infection site can result in unnecessary depopulation. Therefore, it is useful to quantify the transmission distance from infected premises (IPs) before determining the optimal area for preemptive depopulation. Accordingly, we analyzed the transmission risk within spatiotemporal clusters of IPs using transmission kernel estimates derived from phylogenetic clustering information on 311 HPAI H5N6 IPs identified during the 2016–2017 epidemic, Republic of Korea. Subsequently, we explored the impact of varying the culling radius on the local transmission of HPAI given the transmission risk estimates. The domestic duck farm density was positively associated with higher transmissibility. Ring culling over a radius of 3 km may be effective for areas with high dense duck holdings, but this approach does not appear to significantly reduce the risk for local transmission in areas with chicken farms. This study provides the first estimation of the local transmission dynamics of HPAI in the Republic of Korea as well as insight into determining an effective ring culling radius.

scholarly journals Epidemiology of H5N8 Highly Pathogenic Avian Influenza (HPAI) in the Republic of Korea

2016 ◽  
Vol 20 (supplement) ◽  
pp. S10-S10
Author(s):  
Young-Myong Kang ◽  
Wooseog Jeong ◽  
Sung-Chul Hwang ◽  
Chung-Sik Jung ◽  
Oun-Kyong Moon ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Highly Pathogenic Avian Influenza ◽  
Republic Of Korea ◽  
Highly Pathogenic ◽  
Pathogenic Avian Influenza ◽  
The Republic

Outbreaks of highly pathogenic avian influenza (H5N1) in the Republic of Korea in 2003/04

2006 ◽  
Vol 158 (10) ◽  
pp. 341-344 ◽  
Author(s):  
S.-H. Wee ◽  
C.-K. Park ◽  
H.-M. Nam ◽  
C.-H. Kim ◽  
H. Yoon ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Highly Pathogenic Avian Influenza ◽  
Republic Of Korea ◽  
Highly Pathogenic ◽  
Pathogenic Avian Influenza ◽  
Avian Influenza H5n1 ◽  
The Republic ◽  
Influenza H5n1

scholarly journals Fine-scale tracking of wild waterfowl and their impact on highly pathogenic avian influenza outbreaks in the Republic of Korea, 2014–2015

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Kyuyoung Lee ◽  
Daesung Yu ◽  
Beatriz Martínez-López ◽  
Hachung Yoon ◽  
Sung-Il Kang ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Habitat Use ◽  
Highly Pathogenic Avian Influenza ◽  
Republic Of Korea ◽  
Highly Pathogenic ◽  
Migratory Waterfowl ◽  
Pathogenic Avian Influenza ◽  
Poultry Farms ◽  
The Republic ◽  
Wild Waterfowl

Abstract Wild migratory waterfowl are considered one of the most important reservoirs and long-distance carriers of highly pathogenic avian influenza (HPAI). Our study aimed to explore the spatial and temporal characteristics of wild migratory waterfowl’s wintering habitat in the Republic of Korea (ROK) and to evaluate the impact of these habitats on the risk of HPAI outbreaks in commercial poultry farms. The habitat use of 344 wild migratory waterfowl over four migration cycles was estimated based on tracking records. The association of habitat use with HPAI H5N8 outbreaks in poultry farms was evaluated using a multilevel logistic regression model. We found that a poultry farm within a wild waterfowl habitat had a 3–8 times higher risk of HPAI outbreak than poultry farms located outside of the habitat. The range of wild waterfowl habitats increased during autumn migration, and was associated with the epidemic peak of HPAI outbreaks on domestic poultry farms in the ROK. Our findings provide a better understanding of the dynamics of HPAI infection in the wildlife–domestic poultry interface and may help to establish early detection, and cost-effective preventive measures.

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