Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Netherlands
Information received on 07/12/2020 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. 5
Date of start of the event 17/10/2020
Date of confirmation of the event 20/10/2020
Report date 07/12/2020
Date submitted to OIE 07/12/2020
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)
Follow-up report No. 9 (04/01/2021)
New outbreaks (3)
Outbreak 1 Mijdrecht, Utrecht
Date of start of the outbreak 25/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Phasianidae (unidentified):Phasianidae (incognita)(Phasianidae) 284 4 3 281 0
Affected population Several captive birds tested positive for highly pathogenic avian influenza subtype H5N8.
Outbreak 2 Bleskensgraaf, Zuid-Holland
Date of start of the outbreak 26/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Mute Swan:Cygnus olor(Anatidae) 3 3 0 0
Affected population On November 26th, three mute swans (Cygnus olor) were found dead in a wetland area. On November 30th, the national reference laboratory confirmed highly pathogenic avian influenza H5N8 in the samples from the mute swans.
Outbreak 3 Bodegraven, Zuid-Holland
Date of start of the outbreak 30/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Mute Swan:Cygnus olor(Anatidae) 13 13 0 0
Affected population On November 30th, 13 mute swans (Cygnus olor) were found dead in a wetland area. On December 2nd, the national reference laboratory confirmed highly pathogenic avian influenza H5N8 in the samples from the mute swans.
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Phasianidae (unidentified):Phasianidae (incognita)(Phasianidae) 284 4 3 281 0
Mute Swan:Cygnus olor(Anatidae) 16 16 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Phasianidae (unidentified):Phasianidae (incognita)(Phasianidae) 1.41% 1.06% 75.00% 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
Diagnostic test results
Laboratory name and type Species Test Test date Result
Wageningen Bioveterinary Research Lelystad (National laboratory) Mute Swan polymerase chain reaction (PCR) 02/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations