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Population-based surveillance of invasive pyogenic streptococcal infection in a large Canadian region

K B Laupland1, T Ross, D L Church

  • 1Department of Medicine, University of Calgary, Calgary, Alberta, Canada. kevin.laupland@calgaryhealthregion.ca

Clinical Microbiology and Infection : the Official Publication of the European Society of Clinical Microbiology and Infectious Diseases
|February 3, 2006
PubMed

Insights

Invasive pyogenic streptococcal infections are common, with the Streptococcus milleri group being the leading cause. Incidence rises with age and is higher in males, varying seasonally.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Epidemiology

Background:

  • Pyogenic streptococci are significant pathogens causing invasive infections.
  • Understanding the epidemiology of these infections is crucial for public health.

Purpose of the Study:

  • To conduct population-based laboratory surveillance of invasive pyogenic streptococcal infections.
  • To determine the incidence rates and etiological agents in the Calgary Health Region.

Main Methods:

  • Population-based laboratory surveillance.
  • Data collected from July 1999 to June 2004 in the Calgary Health Region (1 million population).
  • Analysis of incidence rates for different streptococcal groups.

Main Results:

  • Overall annual incidence of invasive pyogenic streptococcal infections was 18.65/100,000 population.
  • Streptococcus milleri group was the most frequent cause (8.65/100,000).
  • Incidence rates for Groups A, B, G, and C were 4.27, 3.13, 1.83, and 0.41/100,000, respectively. Higher incidence observed in older individuals and males, with seasonal variations noted.

Conclusions:

  • Streptococcus milleri group is a primary cause of invasive streptococcal disease.
  • Invasive infections show age- and sex-related incidence patterns.
  • Epidemiological characteristics vary among different streptococcal groups, highlighting the need for targeted surveillance.

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