Low pathogenic avian influenza (poultry),
Hong Kong (SAR - PRC)
Information received on 02/01/2015 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 30/12/2014
Date of confirmation of the event 30/12/2014
Report date 02/01/2015
Date submitted to OIE 02/01/2015
Date event resolved 30/03/2015
Reason for notification Recurrence of a listed disease
Date of previous occurrence 28/04/2014
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 (02/01/2015)
Follow-up report No. 1 (09/01/2015)
Follow-up report No. 2 (16/01/2015)
Follow-up report No. 3 (23/01/2015)
Follow-up report No. 4 (30/03/2015)
New outbreaks (1)
Outbreak 1 4 Hing Wah Street, Cheung Sha Wan, HONG KONG
Date of start of the outbreak 30/12/2014
Outbreak status Resolved (30/03/2015)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 18962 1 0 18962 0
Affected population An imported consignment of live chickens tested positive for low pathogenic avian influenza H7N9 virus during regular surveillance on 30 December 2014.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 18962 1 0 18962 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.01% 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 imported poultry, wild bird, local poultry farms, poultry markets and pet bird shops. An imported consignment containing 1200 chickens was tested positive for low pathogenic avian influenza virus (H7N9) during the routine surveillance programme. A total of 18,962 poultry, including 11,800 chickens, 3,140 silky chickens, 1,025 chukars and 2,997 pigeons were culled on 31 December 2014. Importation of live poultry is 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 haemagglutination inhibition test (HIT) 30/12/2014 Positive
Tai Lung Veterinary Laboratory, Agriculture, Fisheries and Conservation Department (National laboratory) Birds polymerase chain reaction (PCR) 30/12/2014 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, The 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