OIE: Low pathogenic avian influenza (poultry), Chinese Taipei

OIE: Low pathogenic avian influenza (poultry), Chinese Taipei
submited by kickingbird at Oct, 5, 2010 22:36 PM from OIE

Information received on 04/10/2010 from Dr Kwo-Ching Huang, Chief Veterinary Officer and Deputy Director General, , Bureau of Animal and Plant Health Inspection and Quarantine Council of agriculture, Executive Yuan , Taipei, Chinese Taipei

Summary

Report type	Immediate notification
Start date	20/09/2010
Date of first confirmation of the event	29/09/2010
Report date	04/10/2010
Date submitted to OIE	04/10/2010
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	02/04/2010
Manifestation of disease	Sub-clinical infection
Causal agent	Low pathogenic avian influenza virus
Serotype	H5N2
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)

CHANG-HUA (Fang-Yuan Township)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	18000	20	0	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	0.11%	0.00%	0.00%	0.00%

* 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

An avian influenza virus was isolated by active surveillance sampling and confirmed as H5N2 subtype on 29 September 2010. Antibodies were also detected on those samples. Movement restriction was implemented on the infected farm immediately after the confirmation was made. Clinical health investigation in this farm showed that the layers were in healthy condition with normal egg production. Abnormal mortality was not observed in the infected farm. The clinical and epidemiological investigation of surrounding poultry farms are in progress. Viral pathogenicity test is underway.

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 (2010).

Control measures

Measures applied	Quarantine Movement control inside the country Screening Zoning Disinfection of infected premises/establishment(s) Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

Animal Health Research Institute (National laboratory)

Tests and results

Species	Test	Test date	Result
Birds	haemagglutination inhibition test (HIT)	29/09/2010	Positive
Birds	reverse transcription - polymerase chain reaction (RT-PCR)	29/09/2010	Positive
Birds	virus isolation	29/09/2010	Positive

Future Reporting

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

See Also:

http://www.oie.int

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