OIE: Low pathogenic avian influenza (poultry), Korea (Rep. of)

OIE: Low pathogenic avian influenza (poultry), Korea (Rep. of)
submited by kickingbird at Dec, 15, 2009 10:4 AM from OIE

Information received on 13/12/2009 from Dr Kiyoon Chang, CVO & Director, Labelling, Quarantine and Inspection Division, Ministry of Food, Agriculture, Forestry (MIFAFF), Gyeonggi -Do, Korea (Rep. of)

Summary

Report type	Immediate notification
Start date	26/11/2009
Date of first confirmation of the event	13/12/2009
Report date	13/12/2009
Date submitted to OIE	13/12/2009
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	31/12/2008
Manifestation of disease	Sub-clinical infection
Causal agent	Low pathogenic avian influenza virus
Serotype	H7N2
Nature of diagnosis	Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Location(s)

CHOLLA-NAMDO (Sukgok-myun, Sukgok-myun, Goksung-gun)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	174	10	1	173	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	5.75%	0.57%	10.00%	100.00%

* Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

As part of avian influenza surveillance in the Republic of Korea, Livestock Health Control Association collected on 26 November 2009 faecal samples from chickens and ducks in Sukgok traditional market place (Goksung-gun, Chollanamdo), a market which is held in every 5 days. The samples were sent then to Seoul National University, which is one of the preliminary testing laboratories for avian influenza. A sample from a duck was proved as positive using haemagglutination test on 8 December. For confirmatory test, the sample was sent to the National Veterinary Research and Quarantine Service (NVRQS) on the same day.
The NVRQS confirmed using gene sequencing that the virus isolated from duck faeces was low pathogenic avian influenza virus H7N2 subtype. The remaining 173 chickens and ducks retained by the index seller were culled and burned.
After this confirmation, the investigation is underway to trace the farmer who supplied chickens or ducks to the index seller and the epidemiologically related farms. The avian influenza surveillance in the area surrounding the farms will be intensified.

Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2009).

Control measures

Measures applied	Stamping out Screening Disinfection of infected premises/establishment(s) Vaccination prohibited No treatment of affected animals
Measures to be applied	Zoning

Diagnostic test results

Laboratory name and type

National Veterinary Research and Quarantine Service (NVRQS) (National laboratory)

Tests and results

Species	Test	Test date	Result
Birds	gene sequencing	13/12/2009	Positive
Birds	real-time PCR	13/12/2009	Positive

Future Reporting

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

See Also:

http://www.oie.int

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