Highly pathogenic avian influenza, Vietnam (WAHID Interface - OIE World Animal Health Information Database, 12/16/09, edited)

[Giuseppe]

Highly pathogenic avian influenza, Vietnam (WAHID Interface - OIE World Animal Health Information Database, 12/16/09, edited)

Highly pathogenic avian influenza, Vietnam

Information received on 16/12/2009 from Mr Bui Quang Anh, Chief Veterinary Officer, Department of Animal Health, Ministry of Agriculture and Rural Development, HANOI, Vietnam

• Summary
  • Report type Follow-up report No. 35
  • Start date 07/12/2006
  • Date of first confirmation of the event 19/12/2006
  • Report date 16/12/2009
  • Date submitted to OIE 16/12/2009
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 10/08/2006
  • Manifestation of disease Clinical disease
  • Causal agent Highly pathogenic avian influenza virus
  • Serotype H5N1
  • Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced)
  • This event pertains to a defined zone within the country
  • Related reports
    • Immediate notification (19/12/2006)
    • Follow-up report No. 1 (04/01/2007)
    • Follow-up report No. 2 (17/01/2007)
    • Follow-up report No. 3 (27/02/2007)
    • Follow-up report No. 4 (23/03/2007)
    • Follow-up report No. 5 (02/04/2007)
    • Follow-up report No. 6 (17/05/2007)
    • Follow-up report No. 7 (24/05/2007)
    • Follow-up report No. 8 (07/06/2007)
    • Follow-up report No. 9 (05/07/2007)
    • Follow-up report No. 10 (14/09/2007)
    • Follow-up report No. 11 (11/10/2007)
    • Follow-up report No. 12 (31/10/2007)
    • Follow-up report No. 13 (12/11/2007)
    • Follow-up report No. 14 (07/01/2008)
    • Follow-up report No. 15 (01/02/2008)
    • Follow-up report No. 16 (23/02/2008)
    • Follow-up report No. 17 (12/03/2008)
    • Follow-up report No. 18 (01/04/2008)
    • Follow-up report No. 19 (23/04/2008)
    • Follow-up report No. 20 (14/07/2008)
    • Follow-up report No. 21 (30/09/2008)
    • Follow-up report No. 22 (27/11/2008)
    • Follow-up report No. 23 (30/12/2008)
    • Follow-up report No. 24 (07/01/2009)
    • Follow-up report No. 25 (03/02/2009)
    • Follow-up report No. 26 (06/02/2009)
    • Follow-up report No. 27 (16/02/2009)
    • Follow-up report No. 28 (22/02/2009)
    • Follow-up report No. 29 (06/03/2009)
    • Follow-up report No. 30 (10/04/2009)
    • Follow-up report No. 31 (21/05/2009)
    • Follow-up report No. 32 (26/06/2009)
    • Follow-up report No. 33 (05/11/2009)
    • Follow-up report No. 34 (13/12/2009)
    • Follow-up report No. 35 (16/12/2009)

• New outbreaks
  • Outbreak 1 - Hoang Nong, Hoang Nong, Dai Tu, THAI NGUYEN
    • Date of start of the outbreak 09/12/2009
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 900 - 350 - 310 - 590 - 0
      • Affected Population: These two affected flocks were those in the same village which have not been vaccinated against avian influenza.
  • Outbreak 2 - Yen Lang, Yen Lang, Dai Tu, THAI NGUYEN
    • Date of start of the outbreak 12/12/2009
    • Outbreak status: Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - 152 - 95 - 65 - 87 - 0
      • Affected Population The affected flock was an unvaccinated meat-type duck small household farm.

• Summary of outbreaks
  
  • Total outbreaks: 2
  • Total animals affected: Species - Susceptible - Cases - Deaths Destroyed Slaughtered
    • Birds - 1052 - 445 - 375 - 677 - 0
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 42.30% - 35.65% - 84.27% - 100.00%
    • * Removed from the susceptible population through death, destruction and/or slaughter

• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Introduction of new live animals
    • Illegal movement of animals
    • Fomites (humans, vehicles, feed, etc.)

• Control measures
  • Measures applied
    • Quarantine
    • Movement control inside the country
    • Disinfection of infected premises/establishment(s)
    • Modified stamping out
    • No vaccination
    • No treatment of affected animals
  • Measures to be applied
    • Screening
    • Zoning
    • Vaccination in response to the outbreak (s)

• Diagnostic test results
  • Laboratory name and type National Center for Veterinary Diagnosis (National laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 14/12/2009 - Positive

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

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<cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8767" >WAHID Interface - OIE World Animal Health Information Database</cite>