Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, March 23 2011, edited), poultry, Chiba.

[Giuseppe]

Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, March 23 2011, edited)


[Source: OIE, full page: <cite cite="http://web.oie.int/wahis/public.php?page=single_report&pop=1&reportid=10391 ">WAHID Interface - OIE World Animal Health Information Database</cite>. Extract, edited.]

Highly pathogenic avian influenza, Japan

Information received on 23/03/2011 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan

• Summary
  • Report type Follow-up report No. 11
  • Start date 27/11/2010
  • Date of first confirmation of the event 29/11/2010
  • Report date 23/03/2011
  • Date submitted to OIE 23/03/2011
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 01/04/2009
  • Manifestation of disease Clinical disease
  • Causal agent Highly pathogenic avian influenza virus
  • Serotype H5N1
  • Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced), Necropsy
  • This event pertains to the whole country
  • Related reports
    • Immediate notification (02/12/2010)
    • Follow-up report No. 1 (09/12/2010)
    • Follow-up report No. 2 (16/12/2010)
    • Follow-up report No. 3 (21/12/2010)
    • Follow-up report No. 4 (27/12/2010)
    • Follow-up report No. 5 (23/01/2011)
    • Follow-up report No. 6 (02/02/2011)
    • Follow-up report No. 7 (09/02/2011)
    • Follow-up report No. 8 (17/02/2011)
    • Follow-up report No. 9 (24/02/2011)
    • Follow-up report No. 10 (11/03/2011)
    • Follow-up report No. 11 (23/03/2011)

• New outbreaks
  • Outbreak 1 - Wakaba-ku 2, Chiba city, CHIBA
    • Date of start of the outbreak 16/03/2011
    • Outbreak status Resolved (21/03/2011)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 62000 - 82 - 82 - 61918 - 0
  • Outbreak 2 - Wakaba-ku 1, Chiba city, CHIBA
    • Date of start of the outbreak 13/03/2011
    • Outbreak status Resolved (15/03/2011)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 35000 - 2 - 2 - 34998 - 0

• Summary of outbreaks
  • Total outbreaks: 2
  • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
    • Birds - 97000 - 84 - 84 - 96916 - 0
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 0.09% - 0.09% - 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
  • Wakaba-ku 1, Chiba city, Chiba:
    • On 12 March 2011, poultry was tested positive for influenza A with rapid test at a farm in Wakaba-ku.
    • Virus was identified as H5 with RT-PCR on 13 March and as H5N1 on 16 March.
    • Mandatory movement restriction has been enforced within 10 km around the affected farm since 12 March 2011.
    • All of the poultry at the farm was destroyed by 15 March.
  • Wakaba-ku 2, Chiba city, Chiba:
    • On 16 March 2011, poultry was tested positive for influenza A (H5) with RT-PCR.
    • Virus was identified as H5N1 on 19 March.
    • Mandatory movement restriction has been enforced within 10 km around the affected farm since 16 March 2011.
    • All of the poultry at the farm was destroyed by 21 March.
  • Mandatory movement restrictions were lifted on 10 March in Hiyoshi (follow-up report No. 9), on 11 March in Kitaura-machi (follow-up report No. 9), on 14 March in Kishigawa-cho (follow-up report No. 9) and on 15 March in Kiho-cho (follow-up report No. 9).

• Control measures
  • Measures applied
    • Stamping out
    • Movement control inside the country
    • Screening
    • Disinfection of infected premises/establishment(s)
    • No vaccination
    • No treatment of affected animals
  • Measures to be applied
    • No other measures

• Diagnostic test results
  • Laboratory name and type Chiba Livestock Hygiene Centre (Local laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 13/03/2011 - Positive
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 16/03/2011 - Positive
  • Laboratory name and type National Institute of Animal Health (National laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Birds - gene sequencing - 16/03/2011 - Positive
      • Birds - gene sequencing - 18/03/2011 - Positive
      • Birds - haemagglutination inhibition test (HIT) - 14/03/2011 - Positive
      • Birds - haemagglutination inhibition test (HIT) - 17/03/2011 - Positive
      • Birds - neuraminidase inhibition assay - 16/03/2011 - Positive
      • Birds - neuraminidase inhibition assay - 19/03/2011 - Positive

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

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