HPAI H5N8 03/11/2020
HPAI H5N118/12/2020
LPAI H5N2 02/11/2020
2. Место и примерная площадь поражения
Highly Pathogenic Avian Influenza H5N8 and H5N1 in poultry, in captive birds, in game birds.
Wild birds
HPAI virus (subtypes H5N8 and H5N1)
Severe clinical signs
7. Подробные симптомы в тех случаях, когда это применимо
Present
Present
Present
Present
Present
Present
Drop in egg production, increase in water consumption
8. Отклонение (отклонения) от нормы по
In the winter season 2021/2021, the detection of four HPAI subtypes (H5N8, H5N1 in poultry, captive birds and wild birds, and H5N5 and H5N3 in wild birds) in the same epidemic event is unparalleled in the UK. All of these viruses are genetically closely related through their H5 haemagglutinin gene, which is the key viral gene influencing pathogenesis, host range, transmission and host immunity. Analysis of the virus showed that it shares a common progenitor with the virus derived from the HPAI H5N8 virus circulating across Northern Europe since October 2020. Hence, the data supports indirect/direct introduction from wild birds, rather than undisclosed maintenance of the virus in poultry populations during the last three years.
Sequence of the virus predicted high pathogenicity
N/A
Further infected premises have been identified in 2021. So far during the 2020/2021 winter season infected premises have been identified in England (17), Scotland (2), Wales (1) and Northern Ireland (2). There have been 310 positive detections of HPAI in wild birds in the UK since October 2020.
An Avian Influenza Prevention Zone (AIPZ) has been declared across the whole of GB effective from 5pm on 11 November 2020 with additional housing measures in force from 14 December 2020. The AIPZ means all bird keepers in England (whether they have pet birds, commercial flocks or just a few birds in a backyard flock) are required by law to take a range of biosecurity precautions including from the 14 December 2020 keeping their birds indoors except in very specific circumstances.
Bird gatherings are currently banned in England. Bird gatherings include (but are not limited to) bird fairs, markets, shows, sales, exhibitions, vehicles used to transport live birds where the birds are brought together from multiple premises and some premises used for dealing or internet sales.
Following confirmation of cases of both HPAI H5N8 and LPAI H5N2 in poultry the UK is no longer free from notifiable avian influenza under the World Organisation for Animal Health (OIE) rules.
Where disease is confirmed, we put in place measures in accordance with Council Directive 2005/94/EC. The EU will put safeguard measures in place, meaning that no trade with the EU in live poultry or poultry products will be permitted from disease control zones.
Public Health England advises that the risk to the public’s health from all four of the virus strains which have been found in England (H5N2, H5N8, H5N5, H5N1) is very low. Food Standards Agency (FSA) has said that on the basis of the current scientific evidence, avian influenzas pose a very low food safety risk for UK consumers.
The Animal and Plant Health Agency (APHA) carries out year-round avian influenza surveillance of dead wild birds submitted via public reports and warden patrols. Through this surveillance, multiple species of wild birds have been found to be positive for HPAI H5N8 in locations across Great Britain. In addition, wild birds have been found to be positive for HPAI H5N1 in England, and for HPAI H5N5 in England and Wales (and H5N3 in Northern Ireland).
Defra and the Animal and Plant Health Agency (APHA) carry out routine surveillance of disease risks in the UK and around the world to help us anticipate future threats to animal health and continue to closely monitor the global situation of avian influenza as part of this work. Further details of the latest avian influenza findings in wild birds in Europe can be found in our outbreak assessments: https://www.gov.uk/government/publications/avian-influenza-bird-flu-in-europe