Netherlands - Avian Flu HP H5N6 detected in wild duck - sept 3, 2018

[Gert van der Hoek]

On Wednesday, August 29, 2018, Wageningen Bioveterinary Research (WBVR) confirmed bird flu in a wild duck (mallard) that was found dead at the Eemmeer (lake between the provinces of Utrecht, Flevoland and North Holland). The virus is then typed as high pathogen H5N6.

This subtype was first confirmed in the Netherlands in December 2017 at a poultry farm, and shortly thereafter also in wild birds. The last dead wild bird infected with H5N6 was found in March 2018.

WBVR is currently carrying out further research to gain further insight into the origin and genetic composition of the virus.

[Pathfinder]

Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds), Netherlands

Information received on 03/09/2018 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 Immediate notification Date of start of the event 31/08/2018 Date of confirmation of the event 31/08/2018 Report date 03/09/2018 Date submitted to OIE 03/09/2018 Reason for notification Recurrence of a listed disease Date of previous occurrence 05/04/2018 Manifestation of disease Clinical disease Causal agent Highly pathogenic influenza A virus Serotype H5N6 Nature of diagnosis Clinical, Laboratory (advanced) This event pertains to a defined zone within the country

New outbreaks (1)

Outbreak 1 (WB-2018 H5N6-5) Blaricum, Noord-Holland Date of start of the outbreak 31/08/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Village Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Mallard:Anas platyrhynchos(Anatidae) 1 1 0 0

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Mallard:Anas platyrhynchos(Anatidae) 1 1 0 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Mallard:Anas platyrhynchos(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 This H5N6 subtype is a reassortment linked to H5N8 and not the Asian zoonotic H5N6.

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) Mallard polymerase chain reaction (PCR) 31/08/2018 Positive

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

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=27785