Low pathogenic avian influenza (poultry), Australia (OIE, February 17 2012): No New H5N3 Outbreaks

[Giuseppe]

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


Low pathogenic avian influenza (poultry), Australia


Information received on 17/02/2012 from Dr Mark Schipp, Chief Veterinary Officer, Ministry of Agriculture, Fisheries and Forestry, Ministry of Agriculture, Fisheries and Forestry, Canberra, Australia

• Summary
  • Report type Follow-up report No. 2
  • Start date 25/01/2012
  • Date of first confirmation of the event 25/01/2012
  • Report date 17/02/2012
  • Date submitted to OIE 17/02/2012
  • Reason for notification First occurrence of a listed disease
  • Manifestation of disease Sub-clinical infection
  • Causal agent Low pathogenic avian influenza virus
  • Serotype H5N3
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to the whole country
  • Related reports
    • Immediate notification (27/01/2012)
    • Follow-up report No. 1 (03/02/2012)
    • Follow-up report No. 2 (17/02/2012)
• Outbreaks
  • There are no new outbreaks in this report
• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive
• Epidemiological comments
  • AAHL has isolated a LPNAI virus from affected ducks and on the basis of HA and NA sequences for molecular sub-typing confirmed the outbreak virus to be H5N3 LPAI virus.
  • Blast analysis of the HA gene sequence confirmed highest sequence identity to H5 avian influenza viruses, including LPAI viruses previously isolated from Australian wild ducks.
  • No further cases of LPAI have been detected. Further surveillance is continuing.
  • Notes by the OIE Animal Health Information Department:
    • Since this is the first time that LPAI is identified in poultry in the history of the country, the reason for notification as first occurrence applies to the country but the event is in fact circumscribed to a small area as shown on the map.
    • 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 (2011).
• Control measures
  • Measures applied
    • Stamping out
    • 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 Australian Animal Health Laboratory (National laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - gene sequencing - 17/02/2012 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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