[Rapid antigen detection tests for group A streptococcus in children with pharyngitis]

Area of Science:

• Pediatric infectious diseases
• Microbiology
• Diagnostic testing

Context:

• Acute pharyngitis in children is common, often caused by Group A Streptococcus (GAS).
• Clinical symptoms alone are insufficient to differentiate GAS from viral pharyngitis.
• Accurate diagnosis is crucial for appropriate antibiotic use.

Purpose:

• To evaluate the utility of Rapid Antigen Detection Tests (RADTs) for diagnosing GAS pharyngitis in children.
• To assess the impact of RADTs on antibiotic prescribing practices.

Summary:

• RADTs offer high specificity and negative predictive value for GAS detection, comparable to throat cultures.
• Test performance is influenced by operator training and specimen quality.
• Clinical prediction rules for GAS testing lack sufficient accuracy.

Impact:

• RADTs enable prompt antibiotic decisions, improving patient management.
• Implementation of RADTs leads to a significant reduction (around 30%) in antibiotic prescriptions.
• French guidelines support RADT use in children over 3 with pharyngitis, simplifying diagnosis.