Wildlife and H5N1 HPAI - Current Knowledge (July 2010)
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H5N1 highly pathogenic avian influenza (HPAI) virus that originated from domestic geese in 1996 in Guangdong Province in southern China (Xu, Subbarao, Cox et al. 1999) was first detected in humans and domestic chickens in Hong Kong in 1997 (Alexander 2007). Since 2003, H5N1 HPAI virus clade 2.2 has spread across Asia, Europe and Africa resulting in the loss of over 250 million domestic poultry including chickens, ducks, turkeys, quail and ostrich causing huge negative socioeconomic and liveliho od impacts, as well as affecting food and protein resources, wildlife populations and public health (Alexander 2007). In 2005, the first large scale mortality in wild birds occurred in China and since then there has been increased interest and concern over the role of wild birds in the spread and maintenance of this virus. This Fact Sheet provides up to date information on aspects of the H5N1 virus in relation to wildlife, particularly wild birds. More information is also available on the Sci entific Task Force on Avian Influenza and Wild Birds, jointly coordinated by the Convention on Migratory Species and FAO, www.aiweb.info.