Information received on 23/12/2020 from Dr Christianne Bruschke, Chief Veterinary Officer , Agriculture, Nature and Food Quality, Ministry of Agriculture, Nature and Food Quality, The Hague, Netherlands
Summary
Report type
Follow-up report No. 8
Date of start of the event
17/10/2020
Date of confirmation of the event
20/10/2020
Report date
23/12/2020
Date submitted to OIE
23/12/2020
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
28/09/2018
Manifestation of disease
Clinical disease
Causal agent
Highly pathogenic influenza A virus
Serotype
H5N8
Nature of diagnosis
Clinical, Laboratory (advanced)
This event pertains to
the whole country
Related reports
Immediate notification (23/10/2020)
Follow-up report No. 1 (07/11/2020)
Follow-up report No. 2 (13/11/2020)
Follow-up report No. 3 (17/11/2020)
Follow-up report No. 4 (27/11/2020)
Follow-up report No. 5 (07/12/2020)
Follow-up report No. 6 (09/12/2020)
Follow-up report No. 7 (14/12/2020)
Follow-up report No. 8 (23/12/2020)
New outbreaks (4)

Outbreak 1
Goingarijp, Friesland
Date of start of the outbreak
04/11/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Other
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Eurasian Wigeon:Anas penelope(Anatidae)

2
2
0
0
Affected population
On november 4th two Eurasian wigeons (Mareca /Anas penelope) were found dead in a wetland area. On November 5th the national reference laboratory confirmed highly pathogenic avian influenza H5 in the sample from the Eurasian wigeon (Mareca /Anas penelope).
Outbreak 2
Harlingen, Friesland
Date of start of the outbreak
04/11/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Other
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Greylag Goose:Anser anser(Anatidae)

2
2
0
0
Affected population
On November 4th two Geylag geese (Anser anser) were found dead in a wetland area. On November 5th the national reference laboratory confirmed highly pathogenic avian influenza H5 in the sample from the Geylag Goose (Anser answer).
Outbreak 3
Vinkeveen, Utrecht
Date of start of the outbreak
04/11/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Other
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Greylag Goose:Anser anser(Anatidae)

1
1
0
0
Affected population
On november 4th one Geylag Goose (Anser anser) was found dead in a wetland area. On November 5th the national reference laboratory confirmed highly pathogenic avian influenza H5 in the sample from the Geylag Goose (Anser anser).
Outbreak 4
Schagerbrug, Noord-Holland
Date of start of the outbreak
09/11/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Other
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Greylag Goose:Anser anser(Anatidae)

2
2
0
0
Mute Swan:Cygnus olor(Anatidae)

1
1
0
0
Affected population
On november 9th two Geylag Geese (Anser anser) and one mute swan (Cygnus olor) were found dead in a wetland area. On November 17th the national reference laboratory confirmed highly pathogenic avian influenza H5 in the sample from the Geylag Goose (Anser anser) and the mute swan (Cygnus olor).
Summary of outbreaks
Total outbreaks: 4
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Eurasian Wigeon:Anas penelope(Anatidae)

2
2
0
0
Greylag Goose:Anser anser(Anatidae)

5
5
0
0
Mute Swan:Cygnus olor(Anatidae)

1
1
0
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Eurasian Wigeon:Anas penelope(Anatidae)
**
**
100.00%
**
Greylag Goose:Anser anser(Anatidae)
**
**
100.00%
**
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
Vaccination prohibited
No treatment of affected animals
Measures to be applied
No other measures

Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.