HemoCue America . A qualitative assay for rapid detection of Strep A antigen from throat swabs, using a convenient dipstick format. Boasts 96.2% relative sensitivity and 98.7% relative specificity, 98% overall agreement. This CLIA Waived test provides outstanding performance, even in low colony count samples. Leaves little chance for misdiagnosis, thereby minimizing the risk of rheumatic fever or over-prescription of antibiotics.