Evaluation of the Tasso+ blood self-collection device for quantitation of plasma cytomegalovirus (CMV) DNAemia in adult solid organ transplant recipients (SOTr).

Autor:	Phan T; Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, Washington, USA., Kumar L; Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, Washington, USA., Woo M; Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, Washington, USA., Sadowska-Klasa A; Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, Washington, USA.; Department of Hematology and Transplantology, Medical University of Gdansk, Gdansk, Poland., Castor J; Department of Lab Medicine and Pathology, University of Washington, Seattle, Washington, USA., Pepper G; Department of Lab Medicine and Pathology, University of Washington, Seattle, Washington, USA., Fisher CE; Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, Washington, USA., Limaye AP; Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, Washington, USA.
Jazyk:	angličtina
Zdroj:	Microbiology spectrum [Microbiol Spectr] 2024 Jul 02; Vol. 12 (7), pp. e0003024. Date of Electronic Publication: 2024 May 21.
DOI:	10.1128/spectrum.00030-24
Abstrakt:	Quantitative monitoring of cytomegalovirus (CMV) DNAemia in venous blood is standard in solid organ transplant recipients (SOTr) but is limited by the need for phlebotomy facilities and personnel. The aim of the study was to evaluate the Tasso+ capillary blood (CB) self-collection device for quantitation of plasma CMV DNAemia. Thirty adult SOTr with suspected CMV DNAemia were enrolled to have a supervised Tasso+ CB sample collection within 24 h of a venous sample. CMV DNA was quantitated in paired samples by using the Abbott M2000 Real-Time qPCR instrument. The participants were provided with a study-specific survey that measured patient acceptability of the Tasso+ device compared with venipuncture. A Tasso + CB sample was successfully collected in 28/30 (93%) patients, and 44 paired samples were analyzed. Concordance for detection of CMV DNAemia above the limit of detection (LOD) was 91% (42/44), and the Tasso + CB sample was estimated to be 95% sensitive at a viral load (VL) of 308 IU/mL. Among samples with a quantifiable DNAemia result with both methods ( N = 31), there was excellent correlation between methods (Spearman R 2 = 0.99). The difference in CMV VL between venous and Tasso+ CB samples was not dependent on time ( P > 0.1). Of 12 who completed the survey, 11 (92%) expressed a preference for Tasso+ CB collection over venipuncture. Collection of CB with the Tasso+ device is feasible, patient-acceptable, and yields generally comparable CMV DNAemia load to standard venous samples, but with lower sensitivity. Future studies to optimize and evaluate this methodology for patient self-collected samples are warranted. Importance: We evaluate an FDA-cleared blood self-collection device (Tasso+) and demonstrate that it is patient-acceptable and yields a liquid blood sample with quantitative CMV DNAemia results comparable to those of standard venipuncture samples. This opens up possibilities for self-blood collection to monitor for CMV and potentially other viruses in transplant and other at-risk populations. Competing Interests: The authors declare no conflict of interest.
Databáze:	MEDLINE
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