OIE: Low pathogenic avian influenza (poultry) ,Hong Kong (SAR - PRC)

Information received on 28/01/2014 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 pre-confirmation of the event	27/01/2014
Report date	28/01/2014
Date submitted to OIE	29/01/2014
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

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

HONG KONG ( 4 Hing Wah Street, Cheung Sha Wan )

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	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	Stamping out Quarantine Movement control inside the country Screening Zoning Disinfection of infected premises/establishment(s) No vaccination No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

Tai Lung Veterinary Laboratory, Agriculture, Fisheries and Conservation Department ( National laboratory )

Tests and results

Species	Test	Test date	Result
Birds	polymerase chain reaction (PCR)	27/01/2014	Positive
Birds	virus isolation		Pending

Laboratory name and type

Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong ( Regional Reference Laboratory )

Tests and results

Species	Test	Test date	Result
Birds	gene sequencing		Pending

Future Reporting

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