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Taiwan - 4 new outbreaks of highly pathogenic avian influenza H5N5 in poultry in slaughterhouses and farm, Taipei, Kaohsiung, Tainan, Yunlin (OIE, Ma

Pathfinder

Pathfinder

Editor, Senior Moderator
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[TD="width: *, align: left"]Highly pathogenic avian influenza,
Chinese Taipei[/TD]
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[TD]Information received on 03/03/2020 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. 9[/TD]

[TD="width: 10%"]Date of start of the event[/TD]
[TD="width: 30%"]09/09/2019[/TD]

[TD="width: 10%"]Date of confirmation of the event[/TD]
[TD="width: 30%"]13/09/2019[/TD]

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

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

[TD="width: 10%"]Reason for notification[/TD]
[TD="width: 30%"]New strain of a listed disease in the country[/TD]

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

[TD="width: 10%"]Serotype[/TD]
[TD="width: 30%"]H5N5[/TD]

[TD="width: 10%"]Nature of diagnosis[/TD]
[TD="width: 30%"]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 (23/09/2019) Follow-up report No. 1 (14/10/2019) Follow-up report No. 2 (22/11/2019) Follow-up report No. 3 (03/01/2020) Follow-up report No. 4 (06/01/2020) Follow-up report No. 5 (13/01/2020) Follow-up report No. 6 (22/01/2020) Follow-up report No. 7 (10/02/2020) Follow-up report No. 8 (20/02/2020) Follow-up report No. 9 (03/03/2020) [/TD]
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[TD]New outbreaks (4)
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Wanhua District, Taipei City
Date of start of the outbreak07/02/2020
Outbreak statusContinuing (or date resolved not provided)
Epidemiological unitSlaughterhouse
Affected animals
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds2830280
Affected populationNative Chickens(2020-tp-4) (H5N5&H5N2)

[TD="align: left"]Outbreak 1 (2020-tp-4)[/TD]
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Gangshan District, Kaohsiung City
Date of start of the outbreak13/02/2020
Outbreak statusContinuing (or date resolved not provided)
Epidemiological unitSlaughterhouse
Affected animals
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds10098010090
Affected populationNative Chickens(2020-kh-1)

[TD="align: left"]Outbreak 2 (2020-kh-1)[/TD]
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Yanshui District, Tainan City
Date of start of the outbreak15/02/2020
Outbreak statusContinuing (or date resolved not provided)
Epidemiological unitNot applicable
Affected animals
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds40 4000
Affected populationGeese(2020-tn-1)

[TD="align: left"]Outbreak 3 (2020-tn-1)[/TD]
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Baozhong Township, Yunlin County
Date of start of the outbreak21/02/2020
Outbreak statusContinuing (or date resolved not provided)
Epidemiological unitFarm
Affected animals
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds11046321321107250
Affected populationNative Chickens(2020-yl-2)

[TD="align: left"]Outbreak 4 (2020-yl-2)[/TD]
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Total outbreaks: 4
Total animals affected
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds12123332 **361117620
Outbreak statistics
SpeciesApparent morbidity rateApparent mortality rateApparent case fatality rateProportion susceptible animals lost*
Birds**2.98%**100.00%

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

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

[TD="colspan: 2"]**Not calculated because of missing information[/TD]
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[TD]Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological commentsSamples from Yunlin County, Tainan City were sent to the National Laboratory, Animal Health Research Institute (AHRI) for diagnosis. Highly pathogenic avian influenza H5N5 subtype was confirmed by AHRI. The infected farm has been placed under movement restriction. All animals on the infected farm have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. The infected farm in Yunlin County was cleaned and disinfected. Surrounding poultry farms within 3 km radius of the infected farm are under intensified surveillance for three months. The sampling spot in Tainan City was disinfected. Suspected signs were observed in poultry carcasses during post-mortem inspection in the abattoir in Taipei City and Kaohsiung City. Samples were sent to the AHRI for diagnosis. Highly pathogenic avian influenza H5N5 and H5N2 subtype were confirmed by AHRI. The carcasses were destroyed and thorough cleaning and disinfection have been conducted in the abattoir. After tracing back to the farm of origin, any positive results will be included in follow-up reports.
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[TD]Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Traceability
  • Quarantine
  • Stamping out
  • Zoning
  • Disinfection
  • 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 typeSpeciesTestTest dateResult
Animal Health Research Institute (AHRI) (National laboratory)Birdsgene sequencing09/02/2020Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsgene sequencing17/02/2020Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsgene sequencing19/02/2020Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsgene sequencing24/02/2020Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsreverse transcription - polymerase chain reaction (RT-PCR)08/02/2020Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsreverse transcription - polymerase chain reaction (RT-PCR)16/02/2020Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsreverse transcription - polymerase chain reaction (RT-PCR)18/02/2020Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsreverse transcription - polymerase chain reaction (RT-PCR)23/02/2020Positive
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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=33429
 
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