Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, Dec. 09 2010, edited)

[Giuseppe]

Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, Dec. 09 2010, edited)


[Source: OIE, full text: <cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=10030">WAHID Interface - OIE World Animal Health Information Database</cite>. Edited.]

Highly pathogenic avian influenza, Japan

Information received on 09/12/2010 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan

• Summary
  • Report type Follow-up report No. 1
  • Start date 27/11/2010
  • Date of first confirmation of the event 29/11/2010
  • Report date 09/12/2010
  • Date submitted to OIE 09/12/2010
  • 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)

• Outbreaks
  • There are no new outbreaks in this report

• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive

• Epidemiological comments
  • Incineration of the carcasses and disinfection of the farm were completed on 5 December 2010.
  • It is considered that the virus was carried to the surroundings of the farm by migratory birds because the outbreak occurred in a season when migratory birds came flying from the north to Lake Nakaumi nearby the farm.
  • The virus might have invaded the affected henhouse through wild birds, wild animals or others.
  • The National Institute of Animal Health affirmed by comparison of gene sequence that the isolate is classified into clade 2.3.2 and a closely-related strain with the virus isolated from faeces of migratory wild ducks in Hokkaido in October 2010.
    
  • The homology between these viruses is 99.6%.
    
  • It might indicate there is a possibility that some migratory birds coming flying from the north have highly pathogenic avian influenza virus.
  • Epidemiological survey on the source and the route of infection including virus isolation from the environment is carried over.

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

• Diagnostic test results
  • Laboratory name and type National Institute of Animal Health (National laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Birds - neuraminidase inhibition assay - 02/12/2010 - Positive

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

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