Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, Dec. 21 2010, edited)

[Giuseppe]

Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, Dec. 21 2010, edited)


[Source: OIE, full text: <cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=10074">WAHID Interface - OIE World Animal Health Information Database</cite>. Edited.]

Highly pathogenic avian influenza, Japan

Information received on 21/12/2010 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan

• Summary
  • Report type Follow-up report No. 3
  • Start date 27/11/2010
  • Date of first confirmation of the event 29/11/2010
  • Report date 21/12/2010
  • Date submitted to OIE 21/12/2010
  • 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)

• New outbreaks
  • Outbreak 1 - Around the wild bird park, TOTTORI
    • Date of start of the outbreak 04/12/2010
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Not applicable
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Wild species - ... - 1 - 0 - 1 - 0
  • Summary of outbreaks:
    • Total outbreaks: 1
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Wild species - ** - ** - 0.00% - **
      • * Removed from the susceptible population through death, destruction and/or slaughter
      • ** Not calculated because of missing information

• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Migration of wild birds

• Epidemiological comments
  • An outbreak of HPAI of wild Tundra swan (Cygnus columbianus) was confirmed on 18 December 2010 near water bird sanctuary in Yonago city in Tottori prefecture.
  • The water bird sanctuary is located inside the area of 10 km from the infected farm in Shimane prefecture notified on 2 December 2010.
  • On 4 December 2010, a weakened wild Tundra swan was found.
  • On 5 December 2010, it was sent to the Tottori University.
  • A virus was isolated from the sample on 17 December.
  • On 18 December 2010, it was confirmed that the subtype of the virus was H5N1 by PCR.
  • On the same day, the virus strain was seemed to be closely related with the virus isolated from faeces of migratory wild ducks in Hokkaido in October 2010 and the virus isolated from poultry in Shimane prefecture on 1 December 2010 by comparison of gene sequence.
  • The surveillance zone was established within 10 km around the area where the swan was found.
  • There are 5 poultry farms (about 119,000 birds) in the zone and no suspicion was reported.

• Control measures
  • Measures applied
    • 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 Tottiri University (Private Laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Wild species - gene sequencing - 18/12/2010 - Positive
  • Laboratory name and type Tottori University (Private Laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Wild species - polymerase chain reaction (PCR) - 18/12/2010 - Positive
      • Wild species - virus isolation - 17/12/2010 - Positive

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

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