The role of group C and group G streptococci in acute pharyngitis in children

摘要: Group C streptococci (GCS) and group G beta-haemolytic (GGS) have caused well-documented epidemics of acute pharyngitis in children, but the importance these organisms causing endemic or sporadic is uncertain. The heterogeneity GCS GGS may obscure role certain subtypes, such as large-colony-forming strains (Streptococcus dysgalactiae subsp. equisimilis) G, pharyngitis. For a 1-year period, children (aged 6 months to 18 years) (n = 2085) who presented with children's hospital emergency department two outpatient offices were enrolled cross-sectional study ascertain Control patients 194) same locations during time period non-respiratory tract symptoms orthopaedic cast clinic. Throat cultures obtained by standard reference method, swabs plated on Strep-Selective Agar. Lancefield grouping species identification was performed all isolates. In total, 65 (3%) from patients, three (1.5%) control (odds ratio 2.0; 95% confidence interval 0.6-6.1). low isolation rate indicates that even if are associated acute, paediatric they represent an unusual pathogen.