Introduction Nucleic acid amplification tests (NAATs) play a pivotal role in clinical
laboratories for diagnosing COVID-19. This study aimed to elucidate the accuracy of these …

Abstract Introduction The Tokyo Metropolitan Government (TMG) conducted an external
quality assessment (EQA) survey of pathogen nucleic acid amplification tests (NAATs) as a …

Background A number of nucleic acid amplification tests (NAATs) for SARS-CoV-2 with
different reagents have been approved for clinical use in Japan. These include research kits …

Abstract Coronavirus disease 2019 (COVID-19) can be screened and diagnosed through
the detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by real …

Abstract Background Cycle threshold (Ct) values from SARS-CoV-2 nucleic acid
amplification tests have been used to estimate viral load for treatment decisions …

Objectives We conducted a nationwide external quality assessment (EQA) study of severe
acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleic acid amplification testing in …

At the beginning of 2020, the number of laboratories performing SARS-CoV-2 testing
increased with the rapid expansion of COVID-19 in Hiroshima Prefecture. Thus, it is …

Introduction The accuracy of nucleic acid amplification tests (NAATs) is affected by various
factors; however, studies examining the factors affecting the accuracy of quantitative severe …

Nucleic acid amplification testing (NAAT) for SARS-CoV-2 is the standard approach for
confirming COVID-19 cases. This study compared results between two emergency use …

The recent emergence of the SARS-CoV-2 pandemic has posed formidable challenges for
clinical laboratories seeking reliable laboratory diagnostic confirmation. The swift advance of …