Ann Clin Microbiol 2020;23:117-124. Performance Evaluation of STANDARD F Strep A Ag FIA for Diagnosis of Group A Streptococcal Pharyngitis

Table 1. Clinical performance of STANDARD F Strep A Ag FIA and Sofia Strep A FIA compared to throat culture (n=372)
Rapid antigen detection testsResultsThroat cultureSensitivity (95% CI)Specificity (95% CI)
GAS PositiveGAS Negative  
STANDARD F Strep A Ag FIAPositive961395.0% (88.8-98. 4%)95.2% (91.9-97. 4%)
 Negative5258
SOFIA Strep A FIAPositive951194.1% (87.5-97. 8%)95.9% (92.9-98. 0%)
 Negative6260

Abbreviation: GAS, group A streptococci; CI, confidence interval.