Information received on 08/01/2021 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. 8
Date of start of the event
24/10/2020
Date of confirmation of the event
02/11/2020
Report date
08/01/2021
Date submitted to OIE
08/01/2021
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)
New outbreaks (1)

Outbreak 1 (AI/35/2020/IP1)
Nr Clough, Northern Ireland
Date of start of the outbreak
27/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
32347
197
197
32150
0
Affected population
Commercial egg layer rearing pullets 14 weeks old
Summary of outbreaks
Total outbreaks: 1
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
32347
197
197
32150
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
0.61%
0.61%
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 case in Northern Ireland.

Control measures
Measures applied
Movement control inside the country
Surveillance within containment and/or protection zone
Traceability
Official destruction of animal products
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
Agri-Food and Biosciences Institute (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
01/01/2021
Positive
Weybridge (OIE Reference Laboratory)
Birds
gene sequencing
06/01/2021
Positive
Weybridge (OIE Reference Laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
06/01/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.