Highly Pathogenic Avian Influenza

1. Fecha en que se ha tomado conocimiento de la existencia del brote

HPAI H5N1 13/02/2021; 15/10/2021

HPAI H5N3 01/04/2021

2. Localización y zona aproximada afectada

High pathogenicity avian influenza HPAI H5N1 was first detected this 2021 to 2022 HPAI season in rescued wild swans and captive poultry at a swan sanctuary in Worcester (England) on 15 October 2021. Since then, there have been a further 108 confirmed infected premises were reported with HPAI H5N1 in poultry, game birds and captive birds throughout England (88), Scotland (9), Northern Ireland (6) and Wales (5) (correct as of 28th March 2021). HPAI H5N1 was also detected in February 2021 in game birds in Fife, Scotland as part of the 2020/21 season. HPAI H5N3 was detected in April 2021 in turkeys in Cheshire, England as part of the 2020/21 season.
Zona aproximada afectada
3. Tipo de enfermedad/intoxicación

Highly Pathogenic Avian Influenza H5N1 in poultry, in captive birds, in game birds.

4. Presunta fuente de la enfermedad/intoxicación

Wild birds

5. Posibles agentes causales

HPAI virus (subtype H5N1)

6. Características principales de los síntomas

            Severe clinical signs

7. Síntomas detallados, cuando proceda

8. Desviaciones de la pauta normal en lo concerniente a

9. Número aproximado de casos primarios
10. Número total aproximado de casos
11. Número de fallecimientos
12. Desarrollo del brote

Further infected premises have been identified in 2022. So far during the 2021/2022 winter season infected premises have been identified in England (88), Scotland (9) and Wales (5) and Northern Ireland (6). There have been 841 positive detections of HPAI in wild birds in the UK since October 2021 the vast majority of which have been H5N1 (others are H5Nx -untyped, and one H5N8 in November 2021).                                                       .


13. Medidas adoptadas

An Avian Influenza Prevention Zone (AIPZ) has been declared across the whole of GB effective from 5pm on 3 November 2021 with additional housing measures in force from 29 November 2021. 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 29 November 2021, 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 HPAI H5N1 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.


The UK Health Security Agency (Formerly Public Health England) advises that the risk to the public’s health from of the current strain of 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 H5N1 in locations across the United Kingdom. In addition, one wild bird has been found to be positive for HPAI H5N8 in England.


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:





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