Information received on 10/02/2021 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. 11
Date of start of the event
24/10/2020
Date of confirmation of the event
02/11/2020
Report date
10/02/2021
Date submitted to OIE
10/02/2021
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)
Follow-up report No. 10 (29/01/2021)
Follow-up report No. 11 (10/02/2021)
New outbreaks (1)

Outbreak 1 (AIV 2021/02)
Nr Yearby, Redcar and Cleveland, England
Date of start of the outbreak
03/02/2021
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Other
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
1500
1300
1300
200
0
Affected population
Commercial laying hen unit
Summary of outbreaks
Total outbreaks: 1
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
1500
1300
1300
200
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
86.67%
86.67%
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 on the latest cases in Wales

Control measures
Measures applied
Movement control inside the country
Surveillance outside containment and/or protection zone
Surveillance within containment and/or protection zone
Traceability
Official destruction of animal products
Official disposal of carcasses, by-products and waste
Stamping out
Zoning
Vaccination prohibited
No treatment of affected animals
Measures to be applied
Disinfection
Diagnostic test results
Laboratory name and type
Species
Test
Test date
Result
Animal and Plant Health Agency (APHA), Weybridge, United Kingdom (OIE Reference Laboratory)
Birds
gene sequencing
08/02/2021
Positive
Animal and Plant Health Agency (APHA), Weybridge, United Kingdom (OIE Reference Laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
06/02/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.