Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, Jan 19 2011, edited)

[Giuseppe]

Highly pathogenic avian influenza, Japan (WAHID Interface - OIE World Animal Health Information Database, Jan 19 2011, edited)


[Source: OIE, full text: <cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=10168">WAHID Interface - OIE World Animal Health Information Database</cite>. Edited.]

Highly pathogenic avian influenza, Japan

Information received on 19/01/2011 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan

• Summary
  • Report type Follow-up report No. 2
  • Start date 16/12/2010
  • Date of first confirmation of the event 19/12/2010
  • Report date 19/01/2011
  • Date submitted to OIE 19/01/2011
  • 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 inluenza 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)

• New outbreaks
  • Outbreak 1 - Toyoda-cho water purification facility, Koriyama city, FUKUSHIMA
    • Date of start of the outbreak 04/01/2011
    • Outbreak status Resolved (05/01/2011)
    • Epidemiological unit Not applicable
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Wild species - ... - 2 - 2 - 0 - 0
      • Affected Population Aythya fuligula (tufted duck)
  • Outbreak 2 - Izumi Crane Park, Izumi city, KAGOSHIMA
    • Date of start of the outbreak 18/12/2010
    • Outbreak status Resolved (18/01/2011)
    • Epidemiological unit Not applicable
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Wild species - ... - 5 - 5 - 0 - 0
      • Affected Population Grus monacha (hooded crane)

• Summary of outbreaks
  • Total outbreaks: 2
  • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
    • Wild species - ... - 7 - 7 - 0 - 0
  • 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
  • The first case detected in the Izumi Crane Park (national bird sanctuary) was reported to the OIE in the follow-up report No. 1.
  • A total of 36 dead birds including the first case were found out in the sanctuary between the start date and 18 January 2011: 22 hooded cranes, 4 white-necked cranes and 10 wild ducks.
  • Influenza virus A subtype H5N1 was isolated only from 6 dead hooded cranes including the first case (1 bird).
  • There is no sign of accelerating and explosive spread of infection such as massive deaths of wild birds and a sudden increase of weak birds in the sanctuary.
  • A total of 1,197 faeces of birds collected in the sanctuary between 25 December 2010 and 27 December 2010 were negative to influenza virus.
  • In addition, on 19 December 2010, Hokkaido University confirmed the isolates from dead tufted ducks detected in Fukushima prefecture were positive to influenza virus A subtype H5N1.
  • A total of 3 dead tufted ducks were collected at a water reservoir in Koriyama city on 4 January 2011 and 5 January 2011.
  • The viruses were isolated from a bird collected on 4 January 2011 and another collected on 5 January 2011.

• 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 - gene sequencing - 19/01/2011 - Positive
      • Wild species - virus isolation - 19/01/2011 - Positive
  • Laboratory name and type Tottori University (Private Laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Wild species - virus isolation - 24/12/2010 - Positive
      • Wild species - virus isolation - 27/12/2010 - Positive
      • Wild species - virus isolation - 12/01/2011 - Positive

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

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