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2021-4-23 10:56:12


OIE: Highly pathogenic avian influenza (H5N8), Sweden
submited by kickingbird at Feb, 28, 2021 14:55 PM from OIE

Information received on [and dated] 25 Feb 2021 from Dr Hakan
Henrikson, chief veterinary officer, Swedish Board of Agriculture,
Ministry of Enterprise and Innovation, Jonkoping, Sweden

Summary
Report type: immediate notification
Date of start of the event: 23 Feb 2021
Date of confirmation of the event: 24 Feb 2021
Reason for notification: recurrence of a listed disease
Date of previous occurrence: 19 Nov 2020
Manifestation of disease: clinical disease
Causal agent: highly pathogenic avian influenza virus
Serotype: H5N8
Nature of diagnosis: clinical, laboratory (basic and advanced)
This event pertains to a defined zone within the whole country.

New outbreaks (1)
Summary of outbreaks
Total outbreaks: 1
Outbreak location: Linkoping, Ostergotland
Date of start of the outbreak: 2 Jan 2021
Outbreak status: continuing (or date resolved not provided)
Epidemiological unit: farm
Total animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered
Birds / 14 300 / 350 / 350 / 13 950 / 0
Affected population: This is a farm with broiler chickens, housing
around 14 300 animals. Clinical signs of increased mortality were
observed [on 23 Feb 2021]. All animals euthanized [on 25 Feb 2021]

Outbreak statistics [rates apparent, expressed as percentages]
Species / Morbidity rate / Mortality rate / Case fatality rate /
Proportion susceptible animals lost*
Birds / 2.44 / 2.44 / 100 / 100
*Removed from the susceptible population through death, destruction,
and/or slaughter

Epidemiology
Source of the outbreak(s) or origin of infection: unknown or
inconclusive
Epidemiological comments: A protection zone (3 km [2 mi]) and a
surveillance zone (10 km [6 mi]) have been put in place around the
infected farm and all other restrictions and necessary measures
according to Directive 2005/94/EC are applied.

Control measures
Measures applied: movement control inside the country; surveillance
outside containment and/or protection zone; surveillance within
containment and/or protection zone; traceability; zoning; stamping
out; vaccination prohibited; no treatment of affected animals
Measures to be applied: official destruction of animal products;
official disposal of carcasses, by-products, and waste; disinfection

Diagnostic test results
Laboratory name and type / Species / Test / Test date / Result
National Veterinary Institute (national laboratory) / Birds /
Real-time PCR / 24 Feb 2021 / Positive
National Veterinary Institute (national laboratory) / Birds / Virus
sequencing / 24 Feb 2021 / Positive

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

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