The epidemiology of invasive group A streptococcal disease in Victoria, Australia

Abstract

Objective: To estimate the incidence and severity of invasive group A streptococcal infection in Victoria, Australia. Design: Prospective active surveillance study. Setting: Public and private laboratories, hospitals and general practitioners throughout Victoria. Patients: People in Victoria diagnosed with group A streptococcal disease notified to the surveillance system between 1 March 2002 and 31 August 2004. Main outcome measure: Confirmed invasive group A streptococcal disease. Results: We identified 333 confirmed cases: an average annualised incidence rate of 2.7 (95% Cl, 2.3-3.2) per 100 000 population per year. Rates were highest in people aged 65 years and older and those younger tha..