Taiwan - 2 new outbreaks of low pathogenic avian influenza H5N2 in birds in farms, Taoyuan City, Chiayi County (OIE, January 03, 2020)

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[TD="width: *, align: left"]Low pathogenic avian influenza (poultry),
Chinese Taipei[/TD]
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[TD]Information received on 03/01/2020 from Dr Wen-Jane Tu, Chief Veterinary Officer, Deputy Director General, Bureau of Animal and Plant Health Inspection and Quarantine, Council of Agriculture, Executive Yuan, Taipei, Chinese Taipei[/TD]
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[TD]Summary

[TD="width: 10%"]Report type[/TD]
[TD="width: 30%"]Follow-up report No. 11[/TD]

[TD="width: 10%"]Date of start of the event[/TD]
[TD="width: 30%"]12/01/2015[/TD]

[TD="width: 10%"]Date of confirmation of the event[/TD]
[TD="width: 30%"]14/01/2015[/TD]

[TD="width: 10%"]Report date[/TD]
[TD="width: 30%"]03/01/2020[/TD]

[TD="width: 10%"]Date submitted to OIE[/TD]
[TD="width: 30%"]03/01/2020[/TD]

[TD="width: 10%"]Reason for notification[/TD]
[TD="width: 30%"]Recurrence of a listed disease[/TD]

[TD="width: 10%"]Date of previous occurrence[/TD]
[TD="width: 30%"]2014[/TD]

[TD="width: 10%"]Manifestation of disease[/TD]
[TD="width: 30%"]Clinical disease[/TD]

[TD="width: 10%"]Causal agent[/TD]
[TD="width: 30%"]Low pathogenic avian influenza virus[/TD]

[TD="width: 10%"]Serotype[/TD]
[TD="width: 30%"]H5N2[/TD]

[TD="width: 10%"]Nature of diagnosis[/TD]
[TD="width: 30%"]Clinical, Laboratory (advanced)[/TD]

[TD="width: 10%"]This event pertains to[/TD]
[TD="width: 30%"]a defined zone within the country[/TD]

[TD="width: 10%"]Related reports[/TD]
[TD="width: 30%"] Immediate notification (22/04/2015) Follow-up report No. 1 (12/05/2015) Follow-up report No. 2 (27/07/2015) Follow-up report No. 3 (23/11/2015) Follow-up report No. 4 (03/03/2016) Follow-up report No. 5 (01/05/2017) Follow-up report No. 6 (16/06/2017) Follow-up report No. 7 (26/07/2018) Follow-up report No. 8 (26/09/2018) Follow-up report No. 9 (13/05/2019) Follow-up report No. 10 (08/07/2019) Follow-up report No. 11 (03/01/2020) [/TD]

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[TD]New outbreaks (2)

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Dayuan District, Taoyuan City
Date of start of the outbreak	23/01/2015
Outbreak status	Continuing (or date resolved not provided)
Epidemiological unit	Farm
Affected animals	Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 22000 1000 1000 21000 0
Affected population	Chickens (2019-ty-1)

[TD="align: left"]Outbreak 1 (2019-ty-1)[/TD]

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Dongshi Township, Chiayi County
Date of start of the outbreak	24/01/2015
Outbreak status	Continuing (or date resolved not provided)
Epidemiological unit	Farm
Affected animals	Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 36295 930 930 35365 0
Affected population	Chickens (2019-cy-2)

[TD="align: left"]Outbreak 2 (2019-cy-2)[/TD]

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Total outbreaks: 2
Total animals affected	Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 58295 1930 1930 56365 0
Outbreak statistics	Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 3.31% 3.31% 100.00% 100.00%

[TD="align: left"]Summary of outbreaks[/TD]

[TD="colspan: 2"]*Removed from the susceptible population through death, destruction and/or slaughter[/TD]

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[TD]Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

Samples from Chiayi County and Taoyuan City were sent to the National Laboratory, Animal Health Research Institute (AHRI) for diagnosis. H5N2 subtype avian influenza was confirmed by AHRI. The infected farms were placed under movement restrictions. The pathogenicity of the virus was subsequently confirmed by the AHRI as low pathogenic (less than 75% mortality of the tested chickens) on 17 December 2019. Surrounding poultry farms within 3 km radius of the infected farms were placed under intensified surveillance for three months.

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[TD]Control measures

Measures applied	Movement control inside the country Screening Quarantine Zoning Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

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[TD]Diagnostic test results

Laboratory name and type	Species	Test	Test date	Result
Animal Health Research Institute (AHRI) (National laboratory)	Birds	inoculation test	17/12/2019	Positive

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[TD]Future Reporting

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

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https://www.oie.int/wahis_2/public/...?page_refer=MapFullEventReport&reportid=32778