11/15/2012

Highly pathogenic avian influenza H7, Australia (OIE, November 15 2012, edited)

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

Highly pathogenic avian influenza, Australia

Information received on 15/11/2012 from Dr Mark Schipp, Chief Veterinary Officer, Ministry of Agriculture, Fisheries and Forestry, Ministry of Agriculture, Fisheries and Forestry, Canberra, Australia

  • Summary
    • Report type Immediate notification
    • Date of start of the event 09/11/2012
    • Date of pre-confirmation of the event 14/11/2012
    • Report date 15/11/2012
    • Date submitted to OIE 15/11/2012
    • Reason for notification Reoccurrence of a listed disease
    • Date of previous occurrence 11/1997
    • Manifestation of disease Clinical disease
    • Causal agent Highly pathogenic avian influenza virus
    • Serotype H7
    • Nature of diagnosis Laboratory (basic), Laboratory (advanced)
    • This event pertains to a defined zone within the country
  • New outbreaks
    • Summary of outbreaks
      • Total outbreaks: 1
        • Outbreak Location - NEW SOUTH WALES ( Maitland )
          • Total animals affected:  Species -  Susceptible -  Cases -   Deaths -  Destroyed -   Slaughtered
            • Birds  -  50000  -  5000 -   5000  - … – …
      • Outbreak statistics:   Species -  Apparent morbidity rate -  Apparent mortality rate -  Apparent case fatality rate -  Proportion susceptible animals lost*
        • Birds -  10.00% -  10.00% -   100.00% -   **
        • * 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
    • The affected birds are free range layer hens.
    • The property has several dams that attract wild ducks.
    • A Restricted Area of 3 km diameter surrounded by 7 km diameter Control Area has been established around the property, which is under quarantine restriction.
    • Tracing is underway.
    • Depopulation has commenced.
    • The N type has not yet been determined.
  • Control measures
    • Measures applied
      • Quarantine
      • Movement control inside the country
      • Zoning
      • Vaccination prohibited
      • No treatment of affected animals
    • Measures to be applied
      • Stamping out
      • Disinfection of infected premises/establishment(s)
  • Diagnostic test results
    • Laboratory name and type:  Elizabeth Macarthur Agricultural Institute ( Local laboratory )
      • Tests and results:  Species -  Test - Test date -  Result
        • Birds -  polymerase chain reaction (PCR) -  14/11/2012 -  Positive
    • Laboratory name and type:  Australian Animal Health Laboratory ( National laboratory )
      • Tests and results:  Species -  Test -   Test date -   Result
        • Birds -  gene sequencing -   15/11/2012 -   Positive
        • Birds -  real-time PCR -  15/11/2012 -  Positive
  • Future Reporting
    • The event is continuing. Weekly follow-up reports will be submitted.

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