Quantitative Risk Assessment of HPAI Virus H5N1 Release via Cock Fighting Activities into the 1-km Buffer Zones Surrounding Compartmentalised Broiler Chicken Farms in Thailand

Abstract

After the first outbreak in Thailand caused by highly pathogenic avian influenza virus (HPAIV) subtype H5N1, the Department of Livestock Development (DLD) implemented a range of control measures, including culling (with compensation), movement restriction, improvements in hygiene and biosecurity, and an active surveillance programme (the “X-ray programme”). The DLD has also encouraged broiler chicken farmers to establish compartmentalised production systems, where biosecurity and surveillance measures are implemented within both the boundaries of the farm itself and within the surrounding 1km area around the farm (the ‘buffer zone’) to protect the health status of the farm’s chicken population. The use of compartmentalisation is not only a tool for prevention of HPAIV infection, but also creates disease free areas, allowing a continuation of trade activities. A qualitative risk assessment conducted as part of a larger project funded by the UK Department for International Development (DFID) through the Food and Agriculture Organisation of the United Nations assessed the risk of introduction and transmission of highly pathogenic avian influenza virus (HPAIV) H5N1 into the 1-km buffer zones surrounding compartmentalised poultry farms in Thailand. The results indicated that a more detailed and quantitative risk assessment should be conducted focussing on risk pathways associated with backyard chickens and fighting cocks. Following discussions with the DLD, it was agreed to evaluate the risk of introducing HPAIV subtype H5N1 via cock fighting activities into the buffer zones surrounding compartmentalised broiler farms.

Citation

Mekong Team Working Paper 11, 65 pp.

Quantitative Risk Assessment of HPAI Virus H5N1 Release via Cock Fighting Activities into the 1-km Buffer Zones Surrounding Compartmentalised Broiler Chicken Farms in Thailand

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