The Impact of Experiences and Perceptions of Highly Pathogenic Avian Influenza (HPAI) on Water‐Related Biosecurity Behaviour in Rural Vietnam

Risk Analysis ◽  
2021 ◽  
Author(s):  
Mairéad G. Whelan ◽  
Quynh B. Le ◽  
David C. Hall
Keyword(s):  
Avian Influenza ◽  
Highly Pathogenic Avian Influenza ◽  
Highly Pathogenic ◽  
Pathogenic Avian Influenza ◽  
The Impact

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 The impact of surveillance and control on highly pathogenic avian influenza outbreaks in poultry in Dhaka division, Bangladesh

2018 ◽  
Vol 14 (9) ◽  
pp. e1006439 ◽  
Author(s):  
Edward M. Hill ◽  
Thomas House ◽  
Madhur S. Dhingra ◽  
Wantanee Kalpravidh ◽  
Subhash Morzaria ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Highly Pathogenic Avian Influenza ◽  
Highly Pathogenic ◽  
Pathogenic Avian Influenza ◽  
Influenza Outbreaks ◽  
And Control ◽  
The Impact

scholarly journals The impact of selected risk factors on the occurrence of highly pathogenic avian influenza in commercial poultry flocks in Poland

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Anna Gierak ◽  
Krzysztof Śmietanka
Keyword(s):  
Risk Factors ◽  
Avian Influenza ◽  
Linear Models ◽  
Highly Pathogenic Avian Influenza ◽  
Classification Tree ◽  
Economic Consequences ◽  
Highly Pathogenic ◽  
Pathogenic Avian Influenza ◽  
Spatial Risk ◽  
The Impact

Abstract Introduction Introduction of highly pathogenic avian influenza virus (HPAIV) into a country and its further spread may have a devastating impact on the poultry industry and lead to serious economic consequences. Various risk factors may increase the probability of HPAI outbreak occurrence but their relative influence is often difficult to determine. The study evaluates how the densities of selected poultry species and proximity to the areas inhabited by wild birds impacted HPAI outbreak occurrence during the recently reported epidemics in Poland. Material and methods The analysis was developed using these risk factors in the locations of affected and randomly chosen unaffected commercial farms. Generalised linear and non-linear models, specifically logistic regression, classification tree and random forest, were used to indicate the most relevant risk factors, to quantify their association with HPAI outbreak occurrence, and to develop a map depicting spatial risk distribution. Results The most important risk factors comprised the densities of turkeys, geese and ducks. The abundance of these species of poultry in an area increased the probability of HPAI occurrence, and their farming intensity in several areas of central, western, eastern and northern Poland put these areas at the highest risk. Conclusion The results may improve the targeting of active surveillance, strengthen biosecurity in the areas at risk and contribute to early detection of HPAI in outbreak reoccurrences.

Agribusiness value impacts from highly pathogenic avian influenza

2019 ◽  
Vol 79 (3) ◽  
pp. 371-385
Author(s):  
Jada M. Thompson ◽  
Carlos J.O. Trejo-Pech ◽  
Dustin L. Pendell
Keyword(s):  
Avian Influenza ◽  
Event Study ◽  
Highly Pathogenic Avian Influenza ◽  
Abnormal Returns ◽  
Highly Pathogenic ◽  
Content Type ◽  
Market Values ◽  
Pathogenic Avian Influenza ◽  
Poultry Products ◽  
The Impact

Purpose The purpose of this paper is to determine the impact of 2014–2015 highly pathogenic avian influenza (HPAI), the largest animal health emergency in US history to date, on agribusinesses’ market values. Design/methodology/approach Using the 2014–2015 HPAI outbreaks in US commercial poultry, event study analysis of meat processing and marketing companies is conducted to estimate the effects HPAI had on firm value and how these effects differed across meat marketing firms over distinct disease event dates. The analyses include an overall aggregate event study, chronological outbreak studies, and an analysis that separated firms specifically marketing poultry products from those marketing all other types of meat. Findings By tracing abnormal stock returns through the event dates, the results show heterogeneity of investors responses based on the nature of the event (i.e. backyard vs commercial flocks affected), timing of the event over the course of the entire HPAI outbreak, and if a firm marketed poultry products. Overall, negative abnormal returns, ranging from 2 to 4 percent of publicly traded meat processors’ equities, are predominant post-disease event. These negative effects are slightly higher, above 5 percent, for firms marketing poultry products. Originality/value This study is the first to analyze the effects of an HPAI outbreak on the market value of US agribusiness firms.

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