Hong Kong - 1 new outbreak of highly pathogenic avian influenza H5N6 in a dead crested myna in Kun Lung Wai, Fanling (OIE, April 09, 2018)

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Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds), Hong Kong (SAR - PRC)

Information received on 09/04/2018 from Dr Thomas Sit, Chief Veterinary Officer / Assistant Director (Inspection & Quarantine), Agriculture, Fisheries and Conservation Department, Hong Kong Special Administrative Region Government, Hong Kong , Hong Kong (SAR - PRC)

Summary Report type Immediate notification Date of start of the event 04/04/2018 Date of confirmation of the event 09/04/2018 Report date 09/04/2018 Date submitted to OIE 09/04/2018 Reason for notification Recurrence of a listed disease Date of previous occurrence 07/02/2018 Manifestation of disease Clinical disease Causal agent Highly pathogenic influenza A virus Serotype H5N6 Nature of diagnosis Laboratory (advanced) This event pertains to the whole country

New outbreaks (1)

Outbreak 1 (18-04269) Kun Lung Wai, Fanling, North District, Hong Kong Date of start of the outbreak 04/04/2018 Outbreak status Resolved (04/04/2018) Epidemiological unit Not applicable Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Crested Myna:Acridotheres cristatellus(Sturnidae) 1 1 0 0 Affected population A dead crested myna was collected on 4 April 2018 in Kun Lung Wai, Fanling. It is a common resident species in Hong Kong.

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Crested Myna:Acridotheres cristatellus(Sturnidae) 1 1 0 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Crested Myna:Acridotheres cristatellus(Sturnidae) ** ** 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 Unknown or inconclusive Epidemiological comments An intensive surveillance system is in place for all poultry farms, poultry markets, and pet bird shops in Hong Kong. The H5N6 infected wild bird was detected in the ongoing national surveillance program in wild birds. No spread of disease was evident. There are no poultry farms located within three kilometres of where the bird was found. The Hong Kong Wetland Park and Mai Po Nature Reserve are not located within three kilometres of where the bird was found. The date of end of the outbreak is the same as the date the bird was found (4 April 2018).

Control measures Measures applied Screening 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 Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Crested Myna immunohistochemical test 06/04/2018 Positive Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Crested Myna real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 06/04/2018 Positive Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Crested Myna virus isolation 09/04/2018 Positive Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong (Regional Reference Laboratory) Crested Myna gene sequencing Pending National Influenza Centre, Centre for Health Protection, Department of Health (Regional Reference Laboratory) Crested Myna gene sequencing Pending

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

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