OIE: Highly pathogenic avian influenza(H7N7), Australia

Summary
Report type Immediate notification
Date of start of the event 24/07/2020
Date of confirmation of the event 31/07/2020
Report date 31/07/2020
Date submitted to OIE 31/07/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 21/02/2014
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H7N7
Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced), Necropsy
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 Lethbridge, Victoria
Date of start of the outbreak 24/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 43500 21750 1669 0 0
Affected population One free range premise with two separate sheds. All birds in one shed affected. Birds in the second shed are clinically unaffected.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 43500 21750 1669 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 50.00% 3.84% 7.67% 3.84%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
  • Contact with wild species
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Traceability
  • Quarantine
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • Official destruction of animal products
  • Stamping out
  • Disinfection
Diagnostic test results
Laboratory name and type Species Test Test date Result
AgriBio (Local laboratory) Birds real-time PCR 29/07/2020 Positive
Australian Centre for Disease Preparedness (OIE Reference Laboratory) Birds gene sequencing 31/07/2020 Positive
Australian Centre for Disease Preparedness (OIE Reference Laboratory) Birds real-time PCR 30/07/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.