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Updated situation of Highly Pathogenic Avian Influenza (H5N1) in Asia









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    Book (series)
    Potential risk of Highly Pathogenic Avian Influenza (HPAI) spreading through wild water bird migration
    Updated version
    2005
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    There is a potential that Highly Pathogenic Avian Influenza (HPAI) subtype H5N1 might be carried along migration routes of wild water birds to densely populated areas in the south Asian subcontinent and along migratory flyways to Europe. Recent outbreaks of HPAI in Russia and Kazakhstan (August, 2005) attest to this fact. Looking at the major bird migration routes (Fig. 1), the HPAI H5N1 virus could possibly spread from Siberia to the Caspian and Black Sea areas in the foreseeable future. Some w ild water birds are nesting in the newly AI affected areas in Novosibirsk and Altai in Russia and will migrate to the above-mentioned areas for winter or stop-over on their way to Africa and Europe. Bird migration routes run across Azerbaijan, Iran, Iraq, Georgia, Ukraine and some Mediterranean countries, where bird flu outbreaks are a possibility. Also India and Bangladesh, which currently seem to be uninfected, are at risk because both areas harbour large numbers of domestic duck and the count ries are situated along one of the major migratory routes. They have the potential to become new large endemic foci of HPAI infection. Additionally, spring migration of 2006 may result in the spread of HPAI H5N1 virus across European Russia, because birds migrating from Europe and European Russia and Siberia have common wintering areas in Southwest Asia.
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    Document
    Avian Influenza Disease Emergency: issue No. 61 (31/08/2009)
    AIDEnews
    2009
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    After H5N1 HPAI virus was reported in poultry in South East Asia in early 2004, it was only a matter of time before incursions were reported in Europe and countries of the Central Asia Region. It is widely believed that the virus was mainly spread through migration of wild birds, as well as cross-border trade. Whichever the explanation might be, it was quite evident that by mid 2005 this region was experiencing a major avian influenza H5N1 epidemic. Outbreaks were reported in the Russian Federat ion and Kazakhstan in July 2005, followed by Mongolia in August, Turkey in October, and Ukraine in November of that same year. The first outbreaks occurred in wild birds, followed by rapid spread to domestic poultry: both, backyard and commercial flocks. In January 2006, Turkey reported its first confirmed human case of avian influenza A (H5N1) infection and death, followed shortly thereafter by Azerbaijan in February. From 2006 to 2008, H5N1 HPAI has been repeatedly reported in Pakistan, Iran, Afghanistan and Turkey, which suggests that there are continuous reintroductions from an outside source.
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    Book (series)
    Highly pathogenic H5 avian influenza in 2016 and early 2017 2017
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    During 2016-2017 novel strains of highly pathogenic H5 avian influenza virus within the Goose/Guangdong/96 (Gs/GD/96)-lineage (mainly H5N8) caused multiple outbreaks of disease in poultry and wild birds across much of Europe, parts of Asia, the Middle East and West Africa, and have extended for the first time to affect poultry in Eastern and Southern Africa. The virus was reported first in the Tyva Republic in late May 2016 before being detected elsewhere. This was the fourth intercontinental wa ve of transmission by an H5 virus within this lineage and was by far the most severe in terms of the number of countries affected. This Focus On summarises observations from the fourth intercontinental wave associated with Gs/GD/96-lineage viruses as well as information on other related H5 viruses spreading in 2016-2017. It provides information on the genetics of these viruses, some discussion on the likely progress of the current intercontinental wave and guidance for forecasting future waves. ..

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