Information received on 26/11/2020 from Dr Bogdan Konopka, Chief Veterinary Officer, Ministry of Agriculture and Rural Development, General Veterinary Inspectorate, Warszaw, Poland
Summary
Report type
Immediate notification
Date of start of the event
23/11/2020
Date of confirmation of the event
24/11/2020
Report date
26/11/2020
Date submitted to OIE
26/11/2020
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
13/05/2020
Manifestation of disease
Clinical disease
Causal agent
Highly pathogenic avian influenza virus
Serotype
H5N8
Nature of diagnosis
Laboratory (advanced)
This event pertains to
a defined zone within the country
New outbreaks (1)

Outbreak 1 (2020/33)
Wroniawy, Wolsztyn, wolsztynski (3029), Wielkopolskie
Date of start of the outbreak
23/11/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
924185
118929
15135

0
Summary of outbreaks
Total outbreaks: 1
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
924185
118929
15135

0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
12.87%
1.64%
12.73%
**
*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
Unknown or inconclusive
Epidemiological comments
The outbreak of HPAI of subtype H5N8 was confirmed in the commercial farm with laying hens.

Control measures
Measures applied
Screening
Traceability
Official destruction of animal products
Official disposal of carcasses, by-products and waste
Stamping out
Control of wildlife reservoirs
Zoning
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
National Veterinary Research Institute (National laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
24/11/2020
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.