OIE: Highly pathogenic avian influenza, Chinese Taipei

OIE: Highly pathogenic avian influenza, Chinese Taipei
submited by kickingbird at Mar, 10, 2012 22:37 PM from OIE

Information received on 03/03/2012 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	07/02/2012
Date of first confirmation of the event	13/02/2012
Report date	03/03/2012
Date submitted to OIE	03/03/2012
Reason for notification	First occurrence of a listed disease
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5N2
Nature of diagnosis	Laboratory (advanced)
This event pertains to	the whole country

New outbreaks

Outbreak 1

Liou-Jia District, T´AI-NAN

Date of start of the outbreak

07/02/2012

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	4840	804	804	4036	0

Affected Population

Broiler breeder

Summary of outbreaks

Total outbreaks: 1

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	16.61%	16.61%	100.00%	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

Clinical cases were notified from the abattoir. The local disease control center (LDCC) traced back to the original broiler breeder farm. Movement restrictions and clinical and epidemiological investigation have been implemented. The mortality rate was about 16.6%. All the chickens on the farm were destroyed by LDCC as a precautionary measure on 10 February 2012. The results of RT-PCR test, HA0 cleavage site sequencing and pathogenicity test were obtained on 13 February 2012 and 20 February 2012, respectively. The results confirmed that the virus is classified as H5N2 HPAI virus. Clinical and epidemiological investigations were implemented on the surrounding poultry farms of the infected farm. No clinical suspected case or evidence of infection was detected.

Control measures

Measures applied	Stamping out 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	gene sequencing	13/02/2012	Positive
Birds	haemagglutination inhibition test (HIT)	13/02/2012	Positive
Birds	intravenous pathogenicity index (IVPI) test	20/02/2012	Positive
Birds	reverse transcription - polymerase chain reaction (RT-PCR)	13/02/2012	Positive
Birds	virus isolation	20/02/2012	Positive

Future Reporting

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

See Also:

http://web.oie.int/wahis/public.php?page=single_report&pop=1&reportid=11703

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