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Highly pathogenic avian influenza,
United Kingdom
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Information received on 18/12/2020 from Dr Christine Middlemiss, Chief Veterinary Officer, DEFRA,
Department for Environment,Food and Rural Affairs
, London, United Kingdom
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Summary
| Report type |
Immediate notification |
| Date of start of the event |
13/12/2020 |
| Date of confirmation of the event |
18/12/2020 |
| Report date |
18/12/2020 |
| Date submitted to OIE |
18/12/2020 |
| Reason for notification |
New strain of a listed disease in the country |
| Causal agent |
Highly pathogenic avian influenza virus |
| Serotype |
H5N1 |
| Nature of diagnosis |
Laboratory (basic), Laboratory (advanced) |
| This event pertains to |
a defined zone within the country |
| Related reports |
Immediate notification (18/12/2020)
Follow-up report No. 1 (22/12/2020)
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| Outbreak 1 (AIV 2020/12) |
Nr Hawes, Richmond, England |
| Date of start of the outbreak |
13/12/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Backyard |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
20 |
17 |
17 |
3 |
0 |
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| Affected population |
Backyard flock |
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| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
20 |
17 |
17 |
3 |
0 |
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| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
85.00% |
85.00% |
100.00% |
100.00% |
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| *Removed from the susceptible population through death, destruction and/or slaughter |
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Epidemiology
| Source of the outbreak(s) or origin of infection |
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| Epidemiological comments |
Ongoing Epidemiological investigation.
Initial presumption indicates that this HPAI H5N1 virus belongs 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. Further tests are being carried out to confirm. |
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Control measures
| Measures applied |
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Movement control inside the country
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Surveillance outside containment and/or protection zone
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Surveillance within containment and/or protection zone
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Official disposal of carcasses, by-products and waste
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Stamping out
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Zoning
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Vaccination prohibited
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No treatment of affected animals
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| Measures to be applied |
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Traceability
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Disinfection
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Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| Weybridge (OIE Reference Laboratory) |
Birds |
gene sequencing |
18/12/2020 |
Positive |
| Weybridge (OIE Reference Laboratory) |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
17/12/2020 |
Positive |
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Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |
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Map of outbreak locations
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