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)
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.