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Avian influenza overview March – June 2022.

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Title: Avian influenza overview March – June 2022.
Authors: Adlhoch, Cornelia (AUTHOR), Fusaro, Alice (AUTHOR), Gonzales, José L (AUTHOR), Kuiken, Thijs (AUTHOR), Marangon, Stefano (AUTHOR), Niqueux, Éric (AUTHOR), Staubach, Christoph (AUTHOR), Terregino, Calogero (AUTHOR), Aznar, Inma (AUTHOR), Guajardo, Irene Muñoz (AUTHOR), Baldinelli, Francesca (AUTHOR)
Source: EFSA Journal. Aug2022, Vol. 20 Issue 8, p1-67. 67p.
Subject Terms: *Avian influenza, *Endemic birds, *Bird populations, Poultry farms, Genetic markers, Autumn
Abstract: The 2021–2022 highly pathogenic avian influenza (HPAI) epidemic season is the largest epidemic so far observed in Europe, with a total of 2,398 outbreaks in poultry, 46 million birds culled in the affected establishments, 168 detections in captive birds, and 2,733 HPAI events in wild birds in 36 European countries. Between 16 March and 10 June 2022, 1,182 HPAI virus detections were reported in 28 EU/EEA countries and United Kingdom in poultry (750), and in wild (410) and captive birds (22). During this reporting period, 86% of the poultry outbreaks were secondary due to between‐farm spread of HPAI virus. France accounted for 68% of the overall poultry outbreaks, Hungary for 24% and all other affected countries for less than 2% each. Most detections in wild birds were reported by Germany (158), followed by the Netherlands (98) and the United Kingdom (48). The observed persistence of HPAI (H5) virus in wild birds since the 2020–2021 epidemic wave indicates that it may have become endemic in wild bird populations in Europe, implying that the health risk from HPAI A(H5) for poultry, humans, and wildlife in Europe remains present year‐round, with the highest risk in the autumn and winter months. Response options to this new epidemiological situation include the definition and the rapid implementation of suitable and sustainable HPAI mitigation strategies such as appropriate biosecurity measures and surveillance strategies for early detection measures in the different poultry production systems. Medium to long‐term strategies for reducing poultry density in high‐risk areas should also be considered. The results of the genetic analysis indicate that the viruses currently circulating in Europe belong to clade 2.3.4.4b. HPAI A(H5) viruses were also detected in wild mammal species in Canada, USA and Japan, and showed genetic markers of adaptation to replication in mammals. Since the last report, four A(H5N6), two A(H9N2) and two A(H3N8) human infections were reported in China and one A(H5N1) in USA. The risk of infection is assessed as low for the general population in the EU/EEA, and low to medium for occupationally exposed people. [ABSTRACT FROM AUTHOR]
Copyright of EFSA Journal is the property of European Food Safety Authority and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Avian influenza overview March – June 2022.
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  Data: <searchLink fieldCode="AR" term="%22Adlhoch%2C+Cornelia%22">Adlhoch, Cornelia</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fusaro%2C+Alice%22">Fusaro, Alice</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gonzales%2C+José+L%22">Gonzales, José L</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kuiken%2C+Thijs%22">Kuiken, Thijs</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Marangon%2C+Stefano%22">Marangon, Stefano</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Niqueux%2C+Éric%22">Niqueux, Éric</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Staubach%2C+Christoph%22">Staubach, Christoph</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Terregino%2C+Calogero%22">Terregino, Calogero</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aznar%2C+Inma%22">Aznar, Inma</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guajardo%2C+Irene+Muñoz%22">Guajardo, Irene Muñoz</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Baldinelli%2C+Francesca%22">Baldinelli, Francesca</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22EFSA+Journal%22">EFSA Journal</searchLink>. Aug2022, Vol. 20 Issue 8, p1-67. 67p.
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  Data: *<searchLink fieldCode="DE" term="%22Avian+influenza%22">Avian influenza</searchLink><br />*<searchLink fieldCode="DE" term="%22Endemic+birds%22">Endemic birds</searchLink><br />*<searchLink fieldCode="DE" term="%22Bird+populations%22">Bird populations</searchLink><br /><searchLink fieldCode="DE" term="%22Poultry+farms%22">Poultry farms</searchLink><br /><searchLink fieldCode="DE" term="%22Genetic+markers%22">Genetic markers</searchLink><br /><searchLink fieldCode="DE" term="%22Autumn%22">Autumn</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The 2021–2022 highly pathogenic avian influenza (HPAI) epidemic season is the largest epidemic so far observed in Europe, with a total of 2,398 outbreaks in poultry, 46 million birds culled in the affected establishments, 168 detections in captive birds, and 2,733 HPAI events in wild birds in 36 European countries. Between 16 March and 10 June 2022, 1,182 HPAI virus detections were reported in 28 EU/EEA countries and United Kingdom in poultry (750), and in wild (410) and captive birds (22). During this reporting period, 86% of the poultry outbreaks were secondary due to between‐farm spread of HPAI virus. France accounted for 68% of the overall poultry outbreaks, Hungary for 24% and all other affected countries for less than 2% each. Most detections in wild birds were reported by Germany (158), followed by the Netherlands (98) and the United Kingdom (48). The observed persistence of HPAI (H5) virus in wild birds since the 2020–2021 epidemic wave indicates that it may have become endemic in wild bird populations in Europe, implying that the health risk from HPAI A(H5) for poultry, humans, and wildlife in Europe remains present year‐round, with the highest risk in the autumn and winter months. Response options to this new epidemiological situation include the definition and the rapid implementation of suitable and sustainable HPAI mitigation strategies such as appropriate biosecurity measures and surveillance strategies for early detection measures in the different poultry production systems. Medium to long‐term strategies for reducing poultry density in high‐risk areas should also be considered. The results of the genetic analysis indicate that the viruses currently circulating in Europe belong to clade 2.3.4.4b. HPAI A(H5) viruses were also detected in wild mammal species in Canada, USA and Japan, and showed genetic markers of adaptation to replication in mammals. Since the last report, four A(H5N6), two A(H9N2) and two A(H3N8) human infections were reported in China and one A(H5N1) in USA. The risk of infection is assessed as low for the general population in the EU/EEA, and low to medium for occupationally exposed people. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of EFSA Journal is the property of European Food Safety Authority and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.2903/j.efsa.2022.7415
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      – Code: eng
        Text: English
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        PageCount: 67
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    Subjects:
      – SubjectFull: Avian influenza
        Type: general
      – SubjectFull: Endemic birds
        Type: general
      – SubjectFull: Bird populations
        Type: general
      – SubjectFull: Poultry farms
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      – SubjectFull: Genetic markers
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      – SubjectFull: Autumn
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      – TitleFull: Avian influenza overview March – June 2022.
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