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Low pathogenic avian influenza (poultry), Chinese Taipei (OIE, May 30 2011): One New H7N3 Poultry Outbreak

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  • Low pathogenic avian influenza (poultry), Chinese Taipei (OIE, May 30 2011): One New H7N3 Poultry Outbreak

    [Source: OIE, full page: (LINK). Extract, edited.]

    Low pathogenic avian influenza (poultry), Chinese Taipei


    Information received on 30/05/2011 from Dr Kwo-Ching Huang, Chief Veterinary Officer and Deputy Director General, , Bureau of Animal and Plant Health Inspection and Quarantine Council of agriculture, Executive Yuan , Taipei, Chinese Taipei
    • Summary
      • Report type Follow-up report No. 2
      • Start date 28/03/2011
      • Date of first confirmation of the event 07/04/2011
      • Report date 30/05/2011
      • Date submitted to OIE 30/05/2011
      • Reason for notification Reoccurrence of a listed disease
      • Date of previous occurrence 11/02/2011
      • Manifestation of disease Sub-clinical infection
      • Causal agent Low pathogenic avian influenza virus
      • Serotype H7N3
      • Nature of diagnosis Laboratory (advanced)
      • This event pertains to a defined zone within the country
      • Related reports
        • Immediate notification (11/04/2011)
        • Follow-up report No. 1 (22/04/2011)
        • Follow-up report No. 2 (30/05/2011)
    • New outbreaks
      • Outbreak 1 - Dalin Township, CHIA-I
        • Date of start of the outbreak 20/05/2011
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species Susceptible Cases Deaths Destroyed Slaughtered
          • Birds 1900 20 0 0 0
    • Summary of outbreaks
      • Total outbreaks: 1
      • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
        • Birds - 1.05% - 0.00% - 0.00% - 0.00%
        • * Removed from the susceptible population through death, destruction and/or slaughter
    • Epidemiology
      • Source of the outbreak(s) or origin of infection
        • Unknown or inconclusive
    • Epidemiological comments
      • After the H7N3 outbreak confirmed on 7 April 2011, epidemiological investigation and intensified surveillance were carried out on the surrounding poultry farms within a 3-km-radius area around the index farm.
      • Samples taken from a duck breeder tested positive with both RT-PCR and virus isolation, and identified as H7N3 strain avian influenza virus (AIV) on 26 May 2011.
      • Movement restriction was implemented on the farm immediately after AIV was detected.
      • Clinical investigation on that farm was done and the result showed that the breeders in the farm were healthy without abnormal mortality.
      • The pathogenicity assays of this virus isolate are now in progress.
      • Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2010).
    • Control measures
      • Measures applied
        • Quarantine
        • Movement control inside the country
        • Screening
        • Zoning
        • 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 Animal Health Research Institute (National laboratory)
        • Tests and results: Species Test - Test date Result
          • Birds - haemagglutination inhibition test (HIT) - 26/05/2011 Positive
          • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 26/05/2011 Positive
          • Birds - virus isolation - 26/05/2011 Positive
    • Future Reporting
      • The event is continuing. Weekly follow-up reports will be submitted.
    ()
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