Information received on 25 Jan 2021 from Dr Huang Baoxu, Secretary of
the Party Leadership Group, Animal Health and Epidemiology Centre,
Ministry of Agriculture and Rural Affairs, Qingdao, China (People´s
Rep. of)

Summary
Report type: immediate notification
Date of start of the event: 13 Jan 2021
Date of confirmation of the event: 19 Jan 2021
Reason for notification: new strain of a listed disease
Manifestation of disease: clinical disease
Causal agent: Highly pathogenic avian influenza [AI] virus
Serotype: H5N8
Nature of diagnosis: clinical, laboratory (basic and advance),
necropsy
This event pertains to a defined zone within the country.

New outbreaks: 1
Summary of outbreaks
Total outbreaks: 1
Outbreak location: Dawenliu Management Station, Yellow River Delta
Nature Reserve, Kenli District, Dongying, Shandong
Date of start of the outbreak: 13 Jan 2021
Outbreak status: continuing (or date resolved not provided)
Epidemiological unit: natural park
Total animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered
Mute swan: _Cygnus olor_ (Anatidae) / 249 / 35 / 35 / 0 / 0

Outbreak statistics [rates apparent, expressed as percentages]
Species / Morbidity rate / Mortality rate / Case fatality rate /
Proportion susceptible animals lost*
Mute swan: _Cygnus olor_ (Anatidae) / 14.06 / 14.06 / 100 / 14.06
*Removed from the susceptible population through death, destruction,
and/or slaughter

Epidemiology
Source of the outbreak(s) or origin of infection: unknown or
inconclusive.

Control measures
Measures applied: surveillance within containment and/or protection
zone; quarantine; official disposal of carcasses, by-products and
waste; disinfection; 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
Harbin National Avian Influenza Reference Laboratory (OIE Reference
Laboratory) / birds / reverse transcription-polymerase chain reaction
(RT-PCR) / 19 Jan 2021 / positive
Harbin National Avian Influenza Reference Laboratory (OIE reference
laboratory) / birds / virus isolation / 19 Jan 2021 / positive

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