Quality Assessment of CMV DNA Detection in Dried Blood Spots
Author Information
Author(s): Barbi Maria, MacKay William G, Binda Sandro, van Loon Anton M
Primary Institution: Department of Public Health-Microbiology-Virology, University of Milan, Italy
Hypothesis
How effective are laboratories at detecting CMV DNA in dried blood spots?
Conclusion
The study highlights a significant need for improvement in the sensitivity and specificity of CMV DNA detection methods in laboratories.
Supporting Evidence
- Correct positive results were reported in at least 91% of datasets for samples with a viral load of 8.8 × 104 copies/ml or higher.
- Only 59% and 12% of laboratories correctly identified samples with lower viral loads of 9.4 × 103 and 7.3 × 102 copies/ml, respectively.
- False positive results were reported by 9% of laboratories and in 11% of datasets.
Takeaway
This study looked at how well labs can find a virus in blood samples on paper, and many labs need to do better.
Methodology
A proficiency panel with nine samples was distributed to laboratories, and results were collected using conventional and real-time PCR technologies.
Potential Biases
False positive results were reported by 9% of laboratories, affecting reliability.
Limitations
Limited data on laboratory characteristics and small annual specimen numbers were reported.
Participant Demographics
Most laboratories were from university hospitals, with some experience in DBS testing.
Digital Object Identifier (DOI)
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