Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Hong Kong (SAR - PRC)
Information received on 29/12/2017 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 21/12/2017
Date of confirmation of the event 25/12/2017
Report date 29/12/2017
Date submitted to OIE 29/12/2017
Reason for notification Recurrence of a listed disease
Date of previous occurrence 07/04/2017
Manifestation of disease Clinical disease
Causal agent Highly pathogenic influenza A virus
Serotype H5N6
Nature of diagnosis Laboratory (advanced), Necropsy
This event pertains to the whole country
New outbreaks (1)
Outbreak 1 Hong Kong Wetland Park,Tin Shui Wai, Yuen Long , HONG KONG
Date of start of the outbreak 21/12/2017
Outbreak status Resolved (21/12/2017)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-faced spoonbill:Platalea minor(Threskiornithidae) 1 1 0 0
Affected population A dead Black-faced spoonbill was collected on 21st December 2017 at the mudflat of Hong Kong Wetland Park. The species is a common winter visitor in Deep Bay areas with small number recorded in summer.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Black-faced spoonbill:Platalea minor(Threskiornithidae) 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Black-faced spoonbill:Platalea minor(Threskiornithidae) ** ** 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 virus was detected during disease investigation of the species. No spread of disease was evident. There are two poultry farms located within three kilometres of where the bird was found. No abnormalities or signs of avian influenza were found in the two poultry farms. The date of end of the outbreak is the same as the date the bird was found (21 Decemeber 2017).
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) Black-faced spoonbill immunohistochemical test 22/12/2017 Positive
Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Black-faced spoonbill nucleotide sequencing 27/12/2017 Positive
Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Black-faced spoonbill real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 22/12/2017 Positive
Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory) Black-faced spoonbill virus isolation 25/12/2017 Positive
Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong (Regional Reference Laboratory) Black-faced spoonbill gene sequencing Pending
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations