Low pathogenic avian influenza (poultry),
Hong Kong (SAR - PRC)
Information received on 29/01/2014 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 27/01/2014
Date of confirmation of the event 27/01/2014
Report date 28/01/2014
Date submitted to OIE 29/01/2014
Date event resolved 28/04/2014
Reason for notification First occurrence of a listed disease
Manifestation of disease Sub-clinical infection
Causal agent Low pathogenic avian influenza virus
Serotype H7N9
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (28/01/2014)
Follow-up report No. 1 (12/02/2014)
Follow-up report No. 2 (19/02/2014)
Follow-up report No. 3 (24/03/2014)
Follow-up report No. 4 (28/04/2014)
New outbreaks (1)
Outbreak 1 4 Hing Wah Street, Cheung Sha Wan, HONG KONG
Date of start of the outbreak 27/01/2014
Outbreak status Resolved (28/04/2014)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 22604 2600 0 22604 0
Affected population An imported consignment of live chickens was tested positive for low pathogenic H7N9 avian influenza virus during regular surveillance on 27 January 2014.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 22604 2600 0 22604 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 11.50% 0.00% 0.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Legal movement of animals
Epidemiological comments An intensive surveillance system is in place for all import poultry, wild bird, local poultry farms, poultry markets and pet bird shops. An imported consignment containing 2,600 silky chickens was tested positive for low pathogenic avian influenza virus (H7N9) in the routine surveillance programme. A total of 22,604 poultry, including 16,984 chickens, 2,898 silky fowls, 1,080 pheasants and 1,642 pigeons were culled on 28 January 2014. Importation of live poultry and movement of poultry in local farms are banned for 21 days.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection / Disinfestation
  • Quarantine
  • Stamping out
  • Zoning
  • 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 and Conservation Department (National laboratory) Birds polymerase chain reaction (PCR) 27/01/2014 Positive
Tai Lung Veterinary Laboratory, Agriculture, Fisheries and Conservation Department (National laboratory) Birds virus isolation Pending
Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong (Regional Reference Laboratory) Birds gene sequencing Pending
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations