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Influenza surveillance in Victoria, 2006

James E Fielding1, Emma R Miller, Josie Adams

  • 1Communicable Disease Control Unit, Department of Human Services, Melbourne, Victoria. James.Fielding@dhs.vic.gov.au

Communicable Diseases Intelligence Quarterly Report
|May 17, 2007
PubMed

Insights

The 2006 Victorian influenza season was mild, peaking in August. Surveillance data showed influenza-like illness (ILI) rates and confirmed cases aligned, with Type A influenza predominating.

Area of Science:

  • Epidemiology
  • Virology
  • Public Health

Background:

  • Victorian influenza seasons typically exhibit seasonal activity patterns.
  • Monitoring influenza activity is crucial for public health interventions.

Purpose of the Study:

  • To describe the epidemiological characteristics of the 2006 Victorian influenza season.
  • To identify the predominant influenza strains circulating and compare them to vaccine strains.

Main Methods:

  • Sentinel surveillance by general practitioners (GPs) and the Melbourne Medical Locum Service (MMLS).
  • Reporting of influenza-like illness (ILI) rates and laboratory-confirmed influenza cases.
  • Viral typing of confirmed influenza cases.

Main Results:

  • The 2006 season was mild and peaked in mid-August.
  • Average ILI rates were 5.6 per 1,000 consultations (GPs) and 8.5 per 1,000 call-outs (MMLS).
  • Type A influenza accounted for 82% of confirmed cases, with strains A/Wisconsin/67/2005(H3N2)-like and B/Malaysia/2506/2004-like predominating.

Conclusions:

  • The 2006 Victorian influenza season demonstrated typical patterns but with reduced severity.
  • Circulating influenza strains were identified, informing future vaccine composition.
  • Surveillance systems effectively tracked influenza activity and strain prevalence.

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