Point-of-care evaluation of a rapid antigen test (CLINITEST Rapid COVID-19 Antigen Test) for diagnosis of SARS-CoV-2 infection in symptomatic and asymptomatic individuals

Torres, I.; Poujois, S.; Albert, E.; Alvarez, G.; Colomina, J.; Navarro, D.

Rapid antigen assays (RAD) based on lateral flow immunochromatography (LFIC) technology have emerged as a valuable tool for the control of COVID-19 pandemic. Manufacturer-independent, real-world evaluation of these assays is crucial given the considerable heterogeneity reported in their clinical and analytical performances. Here, we report for the first time on the point-of-care performance of the CLINITEST Rapid COVID-19 Antigen Test (Siemens, Healthineers, Erlangen, Germany) to detect SARS-CoV-2 infection in presumptive COVID-19 cases or asymptomatic close contacts of COVID-19 patients. When compared to RT-PCR, the overall sensitivity of the assay was 80.2 (95% CI, 70.9-87.1) for symptomatic patients sampled (nasopharyngeal specimens) within five days after the onset of symptoms and 60% (95% CI, 40.7-76.6%) for asymptomatic participants. The overall specificity was 100% in both population groups.