Summary
Report type: immediate notification
Date of start of the event: 20 Feb 2021
Date of confirmation of the event: 8 Mar 2021
Reason for notification: recurrence
Date of previous occurrence: 23 Feb 2018
Reported on: 18 Mar 2021
Manifestation of disease: clinical disease
Causal agent: Highly pathogenic avian influenza virus
Serotype: H5
Nature of diagnosis: Laboratory
This event pertains to a defined zone within the country.

New outbreaks (2)
Outbreak location 1: Arnebo, Heby, Vastmanland
Date of start of the outbreak: 4 Mar 2021
Epidemiological unit: other
Affected animals:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered-Killed for commercial use / Vaccinated
Whooper Swan (_Cygnus cygnus_): Anatidae-Anseriformes / - / 1 / 1 / -
/ - / -
Affected population: A Whooper swan was found dead. It was sent to the
National Veterinary Institute for laboratory analysis as part of the
national surveillance program for avian influenza.

Outbreak location 2: Klippan, Klippan, Skane
Date of start of the outbreak: 20 Feb 2021
Epidemiological unit: other
Affected animals:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered-Killed for commercial use / Vaccinated
Canada Goose (_Branta canadensis_): Anatidae-Anseriformes / - / 1 / 1
/ - / - / -
Affected population: A Canada goose was found dead. It was sent to the
National Veterinary Institute for laboratory analysis as part of the
national surveillance program for avian influenza.

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 outbreak does not
change the disease-free status of Sweden as this is a wild bird, and
therefore do not fall within the OIE definition of poultry.

Control measures applied in wild: Official destruction of animals
products, official disposal of carcasses, by-products and waste

Diagnostic test results
Laboratory name and type: National Veterinary Institute National
Laboratory
Species / Test / Test date / Result
Whopper swan / Canada Goose / Real-time polymerase chain reaction
(real-time PCR) / 8 Mar 2021 / Positive
Whopper swan/ Canada Goose / Gene sequencing / 16 Mar 2021 / Positive