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Low pathogenic avian influenza (poultry) H7N7, United States of America (OIE, June 20 2013): 1 New Outbreak, Arkansas

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  • Low pathogenic avian influenza (poultry) H7N7, United States of America (OIE, June 20 2013): 1 New Outbreak, Arkansas

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


    Low pathogenic avian influenza (poultry) H7N7, United States of America


    Information received on 19/06/2013 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America
    • Summary
      • Report type Immediate notification
      • Date of start of the event 06/06/2013
      • Date of pre-confirmation of the event 17/06/2013
      • Report date 19/06/2013
      • Date submitted to OIE 29/06/2013
      • Reason for notification Reoccurrence of a listed disease
      • Date of previous occurrence 01/08/2011
      • Manifestation of disease Clinical disease
      • Causal agent Low pathogenic avian influenza virus
      • Serotype H7N7
      • Nature of diagnosis Laboratory (advanced)
      • This event pertains to a defined zone within the country
    • New outbreaks
      • Summary of outbreaks
        • Total outbreaks: 1
          • Outbreak Location - ARKANSAS ( Arkansas, Scott County )
            • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
              • Birds - 9800 - ** - 0 - 9800 - 0
            • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
              • Birds - ** - 0.00% - ** - 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 USDA Animal Plant Health Inspection Service (APHIS) and the Arkansas Livestock & Poultry Commission are conducting a comprehensive epidemiological investigation of this event.
      • Testing of the flock was initiated after birds exhibited a drop in egg production of approximately ten percent.
      • Egg production was returning to normal and the birds appeared healthy at the time of inspection.
      • No increased mortality or respiratory signs were reported.
      • 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 (2012).
    • Control measures
      • Measures applied
        • Stamping out
        • Quarantine
        • Movement control inside the country
        • Zoning
        • Vaccination prohibited
        • No treatment of affected animals
      • Measures to be applied
        • Disinfection of infected premises/establishment(s)
    • Diagnostic test results
      • Laboratory name and type: Arkansas Livestock & Poultry Commission Laboratory ( Local laboratory )
        • Tests and results: Species - Test - Test date - Result
          • Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 17/06/2013 - Positive
      • Laboratory name and type: National Veterinary Services Laboratories (NVSL) ( National laboratory )
        • Tests and results: Species - Test - Test date - Result
          • Birds - agar-gel precipitation (AGP) test - 18/06/2013 - Positive
          • Birds - haemagglutination inhibition test (HIT) - 18/06/2013 - Positive
          • Birds - neuraminidase inhibition assay - 18/06/2013 - Positive
          • Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 18/06/2013 - Positive
          • Birds - virus isolation Pending
    • Future Reporting
      • The event is continuing. Weekly follow-up reports will be submitted.
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