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Taiwan - 3 new outbreaks of highly pathogenic avian influenza H5N5 in birds in slaughterhouses and farm, Taipei City, Yunlin County (OIE, January 13,

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 13/01/2020 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. 5[/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%"]13/01/2020[/TD]

[TD="width: 10%"]Date submitted to OIE[/TD]
[TD="width: 30%"]13/01/2020[/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%"]Suspicion, 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 (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) [/TD]
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[TD]New outbreaks (3)
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Wanhua District, Taipei City
Date of start of the outbreak27/12/2019
Outbreak statusContinuing (or date resolved not provided)
Epidemiological unitSlaughterhouse
Affected animals
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds8780870
Affected populationNative Chickens(2019-tp-3)

[TD="align: left"]Outbreak 1 (2019-tp-3)[/TD]
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Wanhua District, Taipei City
Date of start of the outbreak28/12/2019
Outbreak statusContinuing (or date resolved not provided)
Epidemiological unitSlaughterhouse
Affected animals
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds2410240
Affected populationNative Chickens(2019-tp-4)

[TD="align: left"]Outbreak 2 (2019-tp-4)[/TD]
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Mailiao Township, Yunlin County
Date of start of the outbreak31/12/2019
Outbreak statusContinuing (or date resolved not provided)
Epidemiological unitFarm
Affected animals
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds107841000100097840
Affected populationNative Chickens(2019-yl-1)

[TD="align: left"]Outbreak 3 (2019-yl-1)[/TD]
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Total outbreaks: 3
Total animals affected
SpeciesSusceptibleCasesDeathsKilled and disposed ofSlaughtered
Birds108951009100098950
Outbreak statistics
SpeciesApparent morbidity rateApparent mortality rateApparent case fatality rateProportion susceptible animals lost*
Birds9.26%9.18%99.11%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 commentsSamples from Yunlin County 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 in Yunlin County 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 and the sampling spot are under intensified surveillance for three months. Suspected signs were observed in poultry carcasses during post-mortem inspection in the abattoir in Taipei City. Samples were sent to the AHRI for diagnosis. H5N5 subtype HPAI was confirmed by the 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 sequencing29/12/2019Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsgene sequencing30/12/2019Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsgene sequencing03/01/2020Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsreverse transcription - polymerase chain reaction (RT-PCR)28/12/2019Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsreverse transcription - polymerase chain reaction (RT-PCR)29/12/2019Positive
Animal Health Research Institute (AHRI) (National laboratory)Birdsreverse transcription - polymerase chain reaction (RT-PCR)02/01/2020Positive
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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=32852
 
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