Highly pathogenic avian influenza,
United Kingdom
Information received on 31/12/2020 from Dr Christine Middlemiss, Chief Veterinary Officer, DEFRA, Department for Environment,Food and Rural Affairs , London, United Kingdom
Summary
Report type Follow-up report No. 7
Date of start of the event 24/10/2020
Date of confirmation of the event 02/11/2020
Report date 31/12/2020
Date submitted to OIE 31/12/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 06/2017
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N8
Nature of diagnosis Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (03/11/2020)
Follow-up report No. 1 (10/11/2020)
Follow-up report No. 2 (12/11/2020)
Follow-up report No. 3 (03/12/2020)
Follow-up report No. 4 (11/12/2020)
Follow-up report No. 5 (18/12/2020)
Follow-up report No. 6 (22/12/2020)
Follow-up report No. 7 (31/12/2020)
Follow-up report No. 8 (08/01/2021)
Follow-up report No. 9 (15/01/2021)
New outbreaks (2)
Outbreak 1 (AIV 2020/18) Aylesbeare, East Devon, England
Date of start of the outbreak 24/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 6 6 6 0 0
Affected population Backyard flock of six chickens. All of the birds died and there are no poultry remaining on the premises
Outbreak 2 (AIV 2020/16) Great Ellingham, Breckland, England
Date of start of the outbreak 24/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 44 20 20 24 0
Affected population non-commercial poultry species not used for production
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 50 26 26 24 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 52.00% 52.00% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments Epidemiological investigation ongoing.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance within containment and/or protection zone
  • Traceability
  • Official destruction of animal products
  • Zoning
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • Surveillance outside containment and/or protection zone
  • Disinfection
Diagnostic test results
Laboratory name and type Species Test Test date Result
Weybridge (OIE Reference Laboratory) Birds gene sequencing 28/12/2020 Positive
Weybridge (OIE Reference Laboratory) Birds gene sequencing 30/12/2020 Positive
Weybridge (OIE Reference Laboratory) Birds gene sequencing 30/12/2020 Positive
Weybridge (OIE Reference Laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 26/12/2020 Positive
Weybridge (OIE Reference Laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 28/12/2020 Positive
Weybridge (OIE Reference Laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 29/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations