Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Netherlands
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. 1
Date of start of the event 16/10/2020
Date of confirmation of the event 27/10/2020
Report date 23/12/2020
Date submitted to OIE 23/12/2020
Reason for notification New strain of a listed disease in the country
Causal agent Highly pathogenic influenza A virus
Serotype H5N1
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (07/11/2020)
Follow-up report No. 1 (23/12/2020)
New outbreaks (1)
Outbreak 1 Groet, 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
Mute Swan:Cygnus olor(Anatidae) 1 1 0 0
Affected population On the 9th of November, one mute swan (Cygnus Olor) was found dead in a wetland area. On the 23rd of November, the National Reference Laboratory confirmed highly pathogenic avian influenza H5N1 in the sample from the mute swan (Cygnus Olor).
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
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*
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
Epidemiological comments The haemagglutinin (HA) is nearly identical to the HA of the H5N8 wild bird isolates reported in 2020. The other genes are of LPAI origin.
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) 23/11/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations