Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Sweden
Information received on 23/12/2020 from Dr Hakan Henrikson, Chief Veterinary Officer, Swedish Board of Agriculture, Ministry of Enterprise and Innovation, Jönköping, Sweden
Summary
Report type Follow-up report No. 4
Date of start of the event 01/11/2020
Date of confirmation of the event 26/11/2020
Report date 23/12/2020
Date submitted to OIE 23/12/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 06/05/2018
Manifestation of disease Clinical disease
Causal agent Highly pathogenic influenza A virus
Serotype H5N8
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (27/11/2020)
Follow-up report No. 1 (08/12/2020)
Follow-up report No. 2 (09/12/2020)
Follow-up report No. 3 (16/12/2020)
Follow-up report No. 4 (23/12/2020)
Follow-up report No. 5 (07/01/2021)
Follow-up report No. 6 (12/01/2021)
New outbreaks (3)
Outbreak 1 Malmö, Malmö, Malmö, Skåne Län
Date of start of the outbreak 09/12/2020
Outbreak status Resolved (09/12/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Barnacle Goose:Branta leucopsis(Anatidae) 1 0 1 0
Affected population A Barnacle goose (Branta leucopsis) was found with clinical signs of apathy and spastic movments and was for this reason euthanised. It was sent to the National Veterinary Institute for laboratory analysis as part of the national surveillance program for avian influenza. Laboratory testing with real-time PCR and virus sequencing was performed with a positive result for highly pathogenic avian influenza H5N8
Outbreak 2 Skurup, Skurup, Skurup, Skåne Län
Date of start of the outbreak 15/12/2020
Outbreak status Resolved (15/12/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Barnacle Goose:Branta leucopsis(Anatidae) 1 1 0 0
Affected population A Barnacle goose (Branta leucopsis) was found with clinical signs of apathy and later died. It was sent to the National Veterinary Institute for laboratory analysis as part of the national surveillance program for avian influenza. Laboratory testing with real-time PCR and virus sequencing was performed with a positive result for highly pathogenic avian influenza H5N8.
Outbreak 3 Svedala, Klågerup, Klågerup, Skåne Län
Date of start of the outbreak 20/12/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 30 20 20 10 0
Affected population A hobby flock of 30 chickens kept in a backyard without roof coverage. 10 birds died initially, another 10 birds died before 23 december when the last 10 birds where euthanized.
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Barnacle Goose:Branta leucopsis(Anatidae) 2 1 1 0
Birds 30 20 20 10 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Barnacle Goose:Branta leucopsis(Anatidae) ** ** 50.00% **
Birds 66.67% 66.67% 100.00% 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
  • Contact with wild species
Epidemiological comments In accordance with the OIE Terrestrial Animal Health Code, Article 10.4.1, point 8, this event does not change the disease free status of Sweden as these are wild birds, and therefore do not fall within the OIE definition of poultry. One outbreak in a small non-commercial hobby flock was dianosed 23 december. The flock was kept outdoor within a fenced area. The flock has been defined as a holding with birds other than poultry. Measures necessary in accordance with EU legislation, including stamping out, will immediately be applied in order to prevent any spread of avian influenza. The remaining birds were euthanised 23 December, which will be followed by sanitation measures. There has been no contact with other holdings
Control measures
Measures applied
  • Official destruction of animal products
  • Official disposal of carcasses, by-products and waste
  • Stamping out
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
National Veterinary Institute (National laboratory) Birds real-time PCR 21/12/2020 Positive
National Veterinary Institute (National laboratory) Birds virus neutralisation test (VNT) 23/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations