Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, Jan 25 2011, edited), poultry

[Giuseppe]

Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, Jan 25 2011, edited)


[Source: OIE, full page: <cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=10185">WAHID Interface - OIE World Animal Health Information Database</cite>. Edited.]

Highly pathogenic avian influenza, Japan

Information received on 25/01/2011 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan

• Summary
  • Report type Follow-up report No. 5
  • Start date 27/11/2010
  • Date of first confirmation of the event 29/11/2010
  • Report date 23/01/2011
  • Date submitted to OIE 25/01/2011
  • 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)

• New outbreaks
  • Outbreak 1 - Sadohara-cho, Miyazaki city, MIYAZAKI
    • Date of start of the outbreak 21/01/2011
    • Outbreak status Resolved (24/01/2011)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 10240 - 36 - 36 - 10204 - 0
      • Affected Population poultry (broiler breeding stock)
  • Outbreak 2 - Shintomi-cho, Koyu-gun, MIYAZAKI
    • Date of start of the outbreak 23/01/2011
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 410000 - 20 - 20 - 409980 - 0
      • Affected Population Poultry (layer)

• Summary of outbreaks
  • Total outbreaks: 2
  • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
    • Birds - 420240 - 56 - 56 - 420184 - 0
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 0.01% - 0.01% - 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
  • On 21 January 2011, a local veterinary officer visited a farm immediately after notification from the farmer and collected specimens for inspection.
  • On 22 January 2011, Miyazaki prefecture confirmed the samples were positive to influenza A subtype H5 by RT-PCR.
  • All poultry kept in the farm were destroyed by 23 January 2011.
  • On 23 January 2011, the prefecture confirmed samples collected in another farm located at about 8.5 km away from the first farm were also positive to influenza A subtype H5 by RT-PCR.
  • All poultry kept in the same site (12 henhouses) are being destroyed as a susceptible animal.
  • The National Institute of Animal Health confirmed that an isolate from the first farm contained highly pathogenic avian influenza viruses subtype H5N1 on 24 January 2011.
  • The virus is a closely-related strain with the viruses isolated in Shimane prefecture, Toyama prefecture and Kagoshima prefecture.
  • An isolate from the other farm is being tested.
  • Movement restrictions have been conducted within 10 km around the first farm since 21 January 2011 and within 10 km around the other affected farm since 23 January 2011.

• 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 Miyazaki Livestock Hygiene Centre (Local laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 22/01/2011 - Positive
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 23/01/2011 - Positive
  • Laboratory name and type National Institute of Animal Health (National laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Birds - gene sequencing - 24/01/2011 - Positive
      • Birds - neuraminidase inhibition assay - 25/01/2011 - Positive
      • Birds - virus isolation - 24/01/2011 - Positive

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

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