General information
Report type: immediate notification
Disease type: H5N1
Started on: 20 Nov 2021
Confirmed on: 25 Nov 2021
Reported on: 30 Nov 2021
Species: common shelduck
Causal agent: Highly pathogenic avian influenza virus
Genotype / serotype / subtype: H5N1
Nature of diagnosis: clinical, laboratory
Reason for notification: 1st occurrence in a zone or a compartment
This event pertains to a defined zone within the country.

New outbreaks
Summary of outbreak
Total outbreaks (1)
Outbreak locations: Caofeidian wetland and wild bird provincial nature
reserve
Date of the start of the outbreak: 20 Nov 2021
Status: ongoing
Total animals affected:
Species / susceptible / cases / deaths / killed and disposed of /
slaughtered or killed for commercial use / vaccinated / morbidity
(calculated) / mortality (calculated)
Common shelduck (_Tadorna tadorna_): Anatidae-Anseriformes / - / 134 /
134 / 0 / 0 / 0 / - / -

Epidemiology
Source of event or origin of infection: unknown or inconclusive

Control measures at event level
Domestic control measures applied: disinfection; official disposal of
carcasses, by-products, and waste; surveillance outside containment
and or the protection zone; zoning

Diagnostic test results
Laboratory name and type
Harbin National Avian Influenza Reference Laboratory (OIE reference
laboratory)
Species / Outbreaks / Test / Test date / Result
Common shelduck / 1 / real-time reverse transcription polymerase chain
reaction (rRT-PCR) / 25 Nov 2021 / positive
Common shelduck / 1 / virus isolation / 25 Nov 2021 / positive