Information received on 25/01/2021 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. 4
Date of start of the event
08/12/2020
Date of confirmation of the event
09/12/2020
Report date
25/01/2021
Date submitted to OIE
25/01/2021
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
07/01/2020
Manifestation of disease
Clinical disease
Causal agent
Highly pathogenic influenza A virus
Serotype
H5N8
Nature of diagnosis
Laboratory (advanced)
This event pertains to
the whole country
Related reports
Immediate notification (10/12/2020)
Follow-up report No. 1 (21/12/2020)
Follow-up report No. 2 (07/01/2021)
Follow-up report No. 3 (18/01/2021)
Follow-up report No. 4 (25/01/2021)
New outbreaks (1)

Outbreak 1 (2021/2)
Toporzysko, Zlawies Wielka, torunski (0415), Kujawsko-Pomorskie
Date of start of the outbreak
18/01/2021
Outbreak status
Resolved (20/01/2021)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Mute Swan:Cygnus olor(Anatidae)

3
3
0
0
Affected population
Serotype H5N8 was confirmed in 3 Mute Swans (Cygnus olor) found on 18 January 2021 in torunski district.
Summary of outbreaks
Total outbreaks: 1
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Mute Swan:Cygnus olor(Anatidae)

3
3
0
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Mute Swan:Cygnus olor(Anatidae)
**
**
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
Control of wildlife reservoirs
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)
Mute Swan
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
20/01/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.