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Socio-Economic Impact Assessment of Selected Control Strategies for Avian Influenza in Viet Nam and Thailand










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    Avian Influenza Disease Emergency: issue No. 51 (16/03/2008)
    Avian Influenza Disease Emergency
    2008
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    Ducks, people and rice paddies – rather than chickens – are the major factors behind outbreaks of H5N1 highly pathogenic avian influenza in Thailand and Viet Nam, and are probably behind outbreak persistence in other countries of the region such as Cambodia and Lao PDR. In "Mapping H5N1 highly pathogenic avian influenza risk in Southeast Asia: ducks, rice and people", just published in the latest issue (26 March 2008) of the Proceedings of the National Academy of Sciences of the United States (P NAS)*, a group of experts from FAO and associated research centres looked at the series of waves of H5N1 highly pathogenic avian influenza (HPAI) in Thailand and Viet Nam between early 2004 and late 2005.
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    Persistence of Highly Pathogenic Avian Influenza H5N1 Virus Defined by Agro-Ecological Niche 2010
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    Abstract: The highly pathogenic avian influenza (HPAI) H5N1 virus has spread across Eurasia and into Africa. Its persistence in a number of countries continues to disrupt poultry production, impairs smallholder livelihoods, and raises the risk a genotype adapted to human-to-human transmission may emerge. While previous studies identified domestic duck reservoirs as a primary risk factor associated with HPAI H5N1 persistence in poultry in Southeast Asia, little is known of such factors in countr ies with different agro-ecological conditions, and no study has investigated the impact of such conditions on HPAI H5N1 epidemiology at the global scale. This study explores the patterns of HPAI H5N1 persistence worldwide, and for China, Indonesia, and India includes individual provinces that have reported HPAI H5N1 presence during the 2004–2008 period. Multivariate analysis of a set of 14 agricultural, environmental, climatic, and socio-economic factors demonstrates in quantitative terms that a combination of six variables discriminates the areas with human cases and persistence: agricultural population density, duck density, duck by chicken density, chicken density, the product of agricultural population density and chicken output/input ratio, and purchasing power per capita. The analysis identifies five agro-ecological clusters, or niches, representing varying degrees of disease persistence. The agroecological distances of all study areas to the medoid of the niche with the greatest number of human cases are used to map HPAI H5N1 risk globally. The results indicate that few countries remain where HPAI H5N1 would likely persist should it be introduced…
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    Avian Influenza Disease Emergency: issue No. 15 (27/05/2004)
    Update of the Avian Influenza situation (As of 27/05/2004)
    2004
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    Thailand: A new case of avian influenza was found in Mae Haeh (Muang district, Chiangmai Province) at a training farm belonging to the Faculty of Agriculture, Chiengmai University on 22/05/04 where 473 chickens died with AI compatible signs. The farm housed various avian species (layer, broiler, duck, goose, ostrich and native chickens). The animals were destroyed based on clinical suspicion. The farm was isolated from the community and no other poultry farms within 5 kilometre radius. (24/05/04 source: FAO; government, gphin) Indonesia: New cases of Avian Influenza were reported from Sleman and Bantul districts (DI Yogyakarta) and North Lampung District (Lampung Province), the total number of infected provinces is 14, comprising 92 districts. (25/05/04, source: OIE website) Russia: Avian Influenza was reported to occur in Altay Region. Verification and validation of the information is ongoing. (12/05/04, source: gphin) Egypt: In Damietta, avian influenza virus (H10N7) was isolated from 5 wild duck samples taken from a market having hunted migratory birds between 18 and 22 April. wo infant cases (fever and cough) were reported in Ismallia in links to the Damietta influenza case by the father of one of them. (23/05/04, source: ProMED)

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