Diagnosis3337

• Rapid antigen detection test (RADT): 80% to 90% sensitivity; results available within minutes.

• Throat swab and culture: "Gold standard"; results available within 24 to 48 hours. Should be performed in all negative RADTs in children, adolescents, and adults with significant pediatric contact. Also recommended in outbreaks and to monitor for antibiotic resistance.

• These tests should be performed only if there is a clinical suspicion of streptococcal pharyngitis. Pharyngeal carriage of group A streptococci is 5% to 20% in children.

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