Highly pathogenic avian influenza,
Information received on 08/12/2020 from Dr Bogdan Konopka, Chief Veterinary Officer, Ministry of Agriculture and Rural Development, General Veterinary Inspectorate, Warszaw, Poland
Report type Immediate notification
Date of start of the event 03/12/2020
Date of confirmation of the event 04/12/2020
Report date 08/12/2020
Date submitted to OIE 08/12/2020
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
Related reports Immediate notification (08/12/2020)
Follow-up report No. 1 (21/12/2020)
Follow-up report No. 2 (22/12/2020)
Follow-up report No. 3 (28/12/2020)
Follow-up report No. 4 (07/01/2021)
Follow-up report No. 5 (19/01/2021)
New outbreaks (1)
Outbreak 1 (2020/35) Komilowo, Kobylnica, slupski (2212), Pomorskie
Date of start of the outbreak 03/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 269697 7354 7354 262343 0
Affected population The outbreak of highly pathogenic avian influenza of serotype H5N8 was confirmed in the commercial laying hens farm.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 269697 7354 7354 262343 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 2.73% 2.73% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
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) 04/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations