Highly pathogenic avian influenza,
Information received on 07/01/2021 from Dr Bogdan Konopka, Chief Veterinary Officer, Ministry of Agriculture and Rural Development, General Veterinary Inspectorate, Warszaw, Poland
Report type Follow-up report No. 5
Date of start of the event 23/11/2020
Date of confirmation of the event 24/11/2020
Report date 07/01/2021
Date submitted to OIE 07/01/2021
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 (26/11/2020)
Follow-up report No. 1 (03/12/2020)
Follow-up report No. 2 (08/12/2020)
Follow-up report No. 3 (21/12/2020)
Follow-up report No. 4 (28/12/2020)
Follow-up report No. 5 (07/01/2021)
Follow-up report No. 6 (13/01/2021)
Follow-up report No. 7 (19/01/2021)
New outbreaks (1)
Outbreak 1 (2020/51) Stary Wielislaw, Klodzko, klodzki (0208), Dolnoslaskie
Date of start of the outbreak 28/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 195 51 51 144 0
Affected population The outbreak of HPAI of serotype H5N8 was confirmed in a non-commercial hen farm.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 195 51 51 144 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 26.15% 26.15% 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
  • Disinfection
  • 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) 29/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations