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

[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=10184 ">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. 3
  • Start date 16/12/2010
  • Date of first confirmation of the event 19/12/2010
  • 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 (20/12/2010)
    • Follow-up report No. 1 (22/12/2010)
    • Follow-up report No. 2 (19/01/2011)
    • Follow-up report No. 3 (23/01/2011)

• New outbreaks
  • Outbreak 1 - Maruyamachirippu (swamp), Hamanaka-cho, HOKKAIDO
    • Date of start of the outbreak 12/01/2011
    • Outbreak status Resolved (19/01/2011)
    • Epidemiological unit Not applicable
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Wild species - ... - 5 - 5 - 0 - 0
      • Affected Population 3 Cygnus cygnus (whooper swan), 1 Anas acuta (northern pintail), 1 Aythya genus (wild duck)

• 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 - ** - ** - 100.00% - **
    • * 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
    • Unknown or inconclusive

• Epidemiological comments
  • On 19 January 2011, a weak whooper swan was detected near a swamp in Hamanaka-cho, Hokkaido.
  • On 22 January 2011, Hokkaido University confirmed that an isolate from the bird contained highly pathogenic avian influenza virus subtype H5N1.
  • In addition, on 23 January 2011, the university confirmed that 4 other dead wild birds (2 whooper swans, 1 northern pintail and 1 wild duck (Aythya genus) collected near the swamp between 12 January 2011 and 19 January 2011 were also positive to HPAI subtype H5N1.
  • There are 4 poultry holders within 10 km around the swamp.
  • Hokkaido confirmed there was no case in the holders.

• Control measures
  • Measures applied
    • Screening
    • Vaccination prohibited
    • No treatment of affected animals
  • Measures to be applied
    • No other measures

• Diagnostic test results
  • Laboratory name and type Hokkaido University (OIE?s Reference Laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Wild species - virus isolation - 22/01/2011 - Positive
      • Wild species - virus isolation - 23/01/2011 - Positive
      • Wild species - virus sequencing - 22/01/2011 - Positive
      • Wild species - virus sequencing - 23/01/2011 - Positive

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

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