[Early diagnosis of streptococcal pharyngitis in paediatric practice: Validity of a rapid antigen detection test].

Objective: To determine the validity of the rapid antigen test for the diagnoses of acute pharyngitis caused by group A beta-haemolytic Streptococcus (GABHS) compared with culture.

Design: Observational study of a consecutive sample of paediatric patients.

Setting: Two primary care centres (PCC) from the metropolitan area of Barcelona.