Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6115447 | Diagnostic Microbiology and Infectious Disease | 2015 | 7 Pages |
Abstract
Streptococcus pyogenes (group A Streptococcus [GAS]) is the leading cause of bacterial pharyngitis. To perform a rapid diagnosis of GAS pharyngitis, rapid antigen detection tests (RADTs) have been developed. In this study, we evaluated and compared the sensitivity and specificity of 5 RADTs (bioNexia Strep A plusâ¢, bioNexia Strep A dipstickâ¢, Clearview Strep Aâ¢, QuickVue Strep A plusâ¢, and Streptatestâ¢), using analytical approaches combining dilutions in NaCl 0.9% or in pharyngeal flora. The practicability of each RADT was also determined. Among the 630 RADTs performed in this work, all were specific, as no false positive was found resulting in a specificity of 100%. The 5 RADTs detected GAS at 106 CFU/mL in NaCl 0.9% or pooled pharyngeal flora. Regarding the practicability analysis, bioNexia Strep A plus, bioNexia Strep A dipstick and Streptatest RADTs obtained the highest scores for secondary items including kit content and instructions for use information. We concluded that these 5 easy-to-use RADTs are suitable for diagnosis of GAS pharyngitis, as they all detect GAS at a concentration commonly found during pharyngitis.
Keywords
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Authors
Céline Plainvert, Igor Duquesne, Gérald Touak, Nicolas Dmytruk, Claire Poyart,