Multicenter performance evaluation of the Alinity m CMV assay for quantifying cytomegalovirus DNA in plasma samples

Miae Lee, Eliseo Albert, Els Wessels, Soo Kyung Kim, Hae Sun Chung, Estela Giménez, Tom Vreeswijk, Eric C.J. Claas, Yan Chin Tai, Birgit Reinhardt, Mark M. Sasaki, David Navarro

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1 Scopus citations

Abstract

Monitoring of cytomegalovirus (CMV) viral load is critical for informing treatment decisions in order to prevent the severe health consequences of CMV infection or reactivation of latent CMV in immunocompromised individuals. This first field evaluation examined the analytical and clinical performance of the Alinity m CMV assay. Analytical performance was assessed with a commercially available six-member panel, while the clinical performance evaluation compared the Alinity m CMV assay to the RealTime CMV assay and a laboratory-developed test (LDT) as the test of record at three large hospital-based clinical laboratories. Precision of the Alinity m CMV assay was demonstrated with total standard deviation (SD) between 0.08 and 0.28 Log IU/mL. A total of 457 plasma specimens were tested on the Alinity m CMV assay and compared to the test of record at each site (n = 304 with RealTime CMV and n = 153 with LDT CMV). The Alinity m CMV assay had excellent correlation (correlation coefficient r ≥0.942) in comparison to the RealTime CMV or LDT CMV assays. The mean observed bias ranged from −0.03 to 0.34 Log IU/mL. Median onboard turnaround time of Alinity m CMV was less than 3 h. When the CMV assay is run on the Alinity m system, it has the capacity to shorten time to result and, therefore, to therapy.

Original languageEnglish
JournalJournal of Clinical Microbiology
Volume61
Issue number10
DOIs
StatePublished - Oct 2023

Bibliographical note

Publisher Copyright:
Copyright © 2023 Lee et al.

Keywords

  • DNA
  • high-throughput diagnostic assay
  • immunocompromised
  • nucleic acid amplification test
  • transplantation

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