Highly pathogenic avian influenza,
Australia
Information received on 15/11/2012 from Dr Mark Schipp, Chief Veterinary Officer, Ministry of Agriculture, Ministry of Agriculture, 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
Date event resolved 20/03/2013
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
Related reports Immediate notification (15/11/2012)
Follow-up report No. 1 (22/11/2012)
Follow-up report No. 2 (21/12/2012)
Follow-up report No. 3 (27/03/2013)
New outbreaks (1)
Outbreak 1 Maitland, NEW SOUTH WALES
Date of start of the outbreak 09/11/2012
Outbreak status Resolved (20/03/2013)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 50000 5000 5000 45000 0
Affected population Free range egg laying flock
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 50000 5000 5000 45000 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 10.00% 10.00% 100.00% 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 Species Test Test date Result
Elizabeth Macarthur Agricultural Institute (Local laboratory) Birds polymerase chain reaction (PCR) 14/11/2012 Positive
Australian Animal Health Laboratory (National laboratory) Birds gene sequencing 15/11/2012 Positive
Australian Animal Health Laboratory (National laboratory) Birds real-time PCR 15/11/2012 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations