Statistics about Invasive group A Streptococcal disease


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About statistics: This page presents a variety of statistics about Invasive group A Streptococcal disease. The term 'prevalence' of Invasive group A Streptococcal disease usually refers to the estimated population of people who are managing Invasive group A Streptococcal disease at any given time. The term 'incidence' of Invasive group A Streptococcal disease refers to the annual diagnosis rate, or the number of new cases of Invasive group A Streptococcal disease diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

Prevalence and incidence statistics for Invasive group A Streptococcal disease: (see also prevalence and incidence page for Invasive group A Streptococcal disease)
  Incidence (annual) of Invasive group A Streptococcal disease: 2,382 annual cases notified in USA 1999 (MMWR 1999); 1.95 per 100,000 in Canada 20001
  Incidence Rate: approx 1 in 114,189 or 0.00% or 2,382 people in USA [about data]
  Prevalance of Invasive group A Streptococcal disease: About 9,400 cases of invasive GAS disease occurred in the United States in 1999. Of these, about 300 were STSS and 600 were necrotizing fasciitis. In contrast, there are several million cases of strep throat and impetigo each year. 2 ... Approximately 8,800 annual cases of invasive disease (3.2/100,000 population) occurred in 2000; approximately 4% were STSS and 6% were NF.3
Death and mortality statistics for Invasive group A Streptococcal disease:
  Death rate: 11.8% fatality rate for invasive GAS disease (MMWR 1999)
  Mortality rate: About 20% of patients with necrotizing fasciitis and more than half with STSS die. About 10%-15% of patients with other forms of invasive group A streptococcal disease die. 2

Footnotes:
1. Notifiable Diseases Online, PPHB, Canada, 2000
2. excerpt from Group A Streptococcal (GAS) Disease General: DBMD
3. excerpt from Group A Streptococcal (GAS) Disease: DBMD

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