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#Assessment of #risk associated with #influenza A(#H5N8) virus, 17 November 2016 (@WHO)

  Title : #Assessment of #risk associated with #influenza A(#H5N8) virus, 17 November 2016. Subject : Avian Influenza, H5N8 subtype, multi...

29 Nov 2016

Highly pathogenic #avian #influenza #H5, #Japan [two #poultry #outbreaks] (#OIE, Nov. 29 ‘16)

 

Title: Highly pathogenic #avian #influenza #H5, #Japan [two #poultry #outbreaks].

Subject: Avian Influenza, H5 subtype, poultry epizootic in Japan.

Source: OIE, full page: (LINK).

Code: [     ]

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Highly pathogenic avian influenza H5, Japan

Information received on 29/11/2016 from Dr Kazuo Ito, Director, International Animal Health Affairs Office, Animal Health Division, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, Tokyo, Japan

  • Summary
    • Report type Immediate notification
    • Date of start of the event 28/11/2016
    • Date of confirmation of the event 28/11/2016
    • Report date 29/11/2016
    • Date submitted to OIE 29/11/2016
    • Reason for notification Reoccurrence of a listed disease
    • Date of previous occurrence 17/02/2015
    • Manifestation of disease Clinical disease
    • Causal agent Highly pathogenic avian influenza virus
    • Serotype H5
    • Nature of diagnosis Clinical, Laboratory (basic)
    • This event pertains to the whole country
  • New outbreaks
    • Summary of outbreaks
      • Total outbreaks: 2
        • Outbreak Location:
          • AOMORI ( Aomori-shi )
          • NIIGATA ( Sekikawa-mura )
        • Total animals affected: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
          • Birds  - 332090  - 140  - 140  - … - 0
        • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
          • Birds - 0.04% - 0.04% - 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
    • Outbreak 1 (Aomori):
      • On 28 November 2016, the local veterinary service in Aomori Prefecture received a notification from a domestic duck farm on an increase in the number of dead birds (10 birds on the same day).
      • The samples were sent to the laboratory of local veterinary service (Aomori Livestock Hygiene Service Centre) and the samples from dead birds were confirmed to be influenza A virus positive by antigen-capture kits.
      • On the same day, the Centre started RT-PCR and RRT-PCR tests and confirmed that the subtype was H5.
    • Outbreak 2 (Niigata):
      • On 28 November 2016, the local veterinary service in Niigata Prefecture received a notification from a domestic hen farm on an increase in the number of dead birds (60 birds on the same day).
      • The samples were sent to the laboratory of local veterinary service (Niigata Livestock Hygiene Service Centre) and the samples from dead birds were confirmed to be influenza A virus positive by antigen-capture kits.
      • On the same day, the Centre started RT-PCR and RRT-PCR tests and confirmed that the subtype was H5.
    • For both outbreaks:
      • Stamping-out policy was applied to the affected farms. Destruction of all the susceptible birds in the affected farms is being implemented.
      • Movement restrictions are imposed on the farms within a radius of 3km of the affected farms.
      • Shipment restrictions are imposed on the farms within a radius of 3-10km of the affected farms.
      • The N-type has not yet been identified.
  • Control measures
    • Measures applied
      • Movement control inside the country
      • Screening
      • Disinfection / Disinfestation
      • Quarantine
      • Stamping out
      • Vaccination prohibited
      • No treatment of affected animals
    • Measures to be applied
      • No other measures
  • Diagnostic test results
    • Laboratory name and type - Aomori Livestock Hygiene Service Centre ( Local laboratory )
      • Tests and results: Species – Test - Test date – Result
        • Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 28/11/2016 – Positive
        • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 28/11/2016 – Positive
    • Laboratory name and type - Niigata Livestock Hygiene Service Centre ( National laboratory )
      • Tests and results: Species – Test - Test date – Result
        • Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 29/11/2016 – Positive
        • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 29/11/2016 – Positive
  • Future Reporting
    • The event is continuing. Weekly follow-up reports will be submitted.

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Keywords: OIE; Updates; H5; Avian Influenza; Poultry; Japan.

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