Information received on 15/01/2021 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
03/11/2020
Date of confirmation of the event
08/11/2020
Report date
15/01/2021
Date submitted to OIE
15/01/2021
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
26/07/2017
Manifestation of disease
Sub-clinical infection
Causal agent
Highly pathogenic influenza A virus
Serotype
H5N8
Nature of diagnosis
Laboratory (basic), Laboratory (advanced)
This event pertains to
a defined zone within the country
Related reports
Immediate notification (09/11/2020)
Follow-up report No. 1 (12/11/2020)
Follow-up report No. 2 (18/11/2020)
Follow-up report No. 3 (11/12/2020)
Follow-up report No. 4 (18/12/2020)
Follow-up report No. 5 (23/12/2020)
Follow-up report No. 6 (31/12/2020)
Follow-up report No. 7 (08/01/2021)
Follow-up report No. 8 (15/01/2021)
New outbreaks (2)

Outbreak 1 (WB 2020/24)
Nr Moreton on the Marsh, Cotswolds, England
Date of start of the outbreak
18/11/2020
Outbreak status
Resolved (18/11/2020)
Epidemiological unit
Other
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Black Swan:Cygnus atratus(Anatidae)

1
1
0
0
Outbreak 2 (WB 2020/32)
Nr Stratford-On-Avon, Stratford-On-Avon, England
Date of start of the outbreak
02/01/2021
Outbreak status
Resolved (02/01/2021)
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: 2
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Black Swan:Cygnus atratus(Anatidae)

1
1
0
0
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*
Black Swan:Cygnus atratus(Anatidae)
**
**
100.00%
**
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

Control measures
Measures applied
Vaccination permitted (if a vaccine exists)
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)
Black Swan
reverse transcription - polymerase chain reaction (RT-PCR)
26/11/2020
Positive
Weybridge (OIE Reference Laboratory)
Mute Swan
reverse transcription - polymerase chain reaction (RT-PCR)
08/01/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.