Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
United Kingdom
Information received on 17/12/2020 from Dr Christine Middlemiss, Chief Veterinary Officer, DEFRA, Department for Environment,Food and Rural Affairs , London, United Kingdom
Summary
Report type Immediate notification
Date of start of the event 03/12/2020
Date of confirmation of the event 09/12/2020
Report date 11/12/2020
Date submitted to OIE 17/12/2020
Reason for notification New strain of a listed disease in the country
Causal agent Highly pathogenic influenza A virus
Serotype H5N1
Nature of diagnosis Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (11/12/2020)
Follow-up report No. 1 (31/12/2020)
Follow-up report No. 2 (15/01/2021)
New outbreaks (1)
Outbreak 1 (WB 2020/34) Colchester, Tendring, England
Date of start of the outbreak 03/12/2020
Outbreak status Resolved (03/12/2020)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Mute Swan:Cygnus olor(Anatidae) 1 1 0 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Mute Swan:Cygnus olor(Anatidae) 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Mute Swan:Cygnus olor(Anatidae) ** ** 100.00% **
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Epidemiology
Source of the outbreak(s) or origin of infection
  • Contact with wild species
Epidemiological comments HPAI H5N1 virus belonging to the 2.3.4.4 B clade. This clade has acquired gene segments from low pathogenic viruses and is not related to A(H5N1) viruses of e.g. clade 2.3.2.1c causing human infections outside of Europe.
Control measures
Measures applied
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Weybridge (OIE Reference Laboratory) Mute Swan gene sequencing 10/12/2020 Positive
Weybridge (OIE Reference Laboratory) Mute Swan gene sequencing 15/12/2020 Positive
Weybridge (OIE Reference Laboratory) Mute Swan reverse transcription - polymerase chain reaction (RT-PCR) 09/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations