Highly pathogenic avian influenza H7N2, Australia (OIE, October 25 2013): 1 New Poultry Outbreak

[Giuseppe]

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


Highly pathogenic avian influenza H7N2, Australia


Information received on 25/10/2013 from Dr Mark Schipp, Chief Veterinary Officer, Ministry of Agriculture, Ministry of Agriculture, Canberra, Australia

• Summary
  • Report type Follow-up report No. 2
  • Date of start of the event 08/10/2013
  • Date of pre-confirmation of the event 14/10/2013
  • Report date 25/10/2013
  • Date submitted to OIE 25/10/2013
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 20/03/2013
  • Manifestation of disease Clinical disease
  • Causal agent Highly pathogenic avian influenza virus
  • Serotype H7N2
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to a defined zone within the country
  • Related reports
    • Immediate notification (16/10/2013)
    • Follow-up report No. 1 (23/10/2013)
    • Follow-up report No. 2 (25/10/2013)
• New outbreaks (1)
  • Outbreak 1 - Young, NEW SOUTH WALES
    • Date of start of the outbreak 22/10/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 55000 ? 620 ? 620 ? 0 ? 0
      • Affected population: Cage layer hens aged 45-84 weeks
• Summary of outbreaks
  • Total outbreaks: 1
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths - Destroyed ? Slaughtered
      • Birds ? 55000 ? 620 ? 620 ? 0 - 0
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 1.13% - 1.13% - 100.00% - 1.13%
      • *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
  • All birds on the first infected property have been destroyed.
  • The second infected property was under active surveillance as part of the original investigation.
  • The N type has not yet been identified in this second outbreak.
• Control measures
  • Measures applied
    • Quarantine
    • Movement control inside the country
    • Screening
    • 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: Species ? Test - Test date ? Result
    • Australian Animal Health Laboratory (National laboratory) - Birds - polymerase chain reaction (PCR) - 25/10/2013 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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