Information received on 21/12/2020 from Dr Bogdan Konopka, Chief Veterinary Officer, Ministry of Agriculture and Rural Development, General Veterinary Inspectorate, Warszaw, Poland
Summary
Report type
Follow-up report No. 2
Date of start of the event
01/12/2020
Date of confirmation of the event
02/12/2020
Report date
21/12/2020
Date submitted to OIE
21/12/2020
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 (03/12/2020)
Follow-up report No. 1 (09/12/2020)
Follow-up report No. 2 (21/12/2020)
New outbreaks (2)

Outbreak 1 (2020/39)
Swiniarc, Grodziczno, nowomiejski (2812), Warminsko-Mazurskie
Date of start of the outbreak
11/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
9162
3600
3600

0
Affected population
The outbreak of highly pathogenic avian influenza serotype H5N8 was confirmed in the commercial farm with turkey broilers.
Outbreak 2 (2020/43)
Zaborow Stary, Gostynin, gostyninski (1404), Mazowieckie
Date of start of the outbreak
14/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
32
14
14
18
0
Affected population
The outbreak of highly pathogenic avian influenza serotype H5N8 was confirmed in the non-commercial farm with hens and ducks.
Summary of outbreaks
Total outbreaks: 2
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
9194
3614
3614
18
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
39.31%
39.31%
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
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)
12/12/2020
Positive
National Veterinary Research Institute (National laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
15/12/2020
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.