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A metagenomic DNA sequencing assay that is robust against environmental DNA contamination
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A metagenomic DNA sequencing assay that is robust against environmental DNA contamination
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A metagenomic DNA sequencing assay that is robust against environmental DNA contamination
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Journal Article
A metagenomic DNA sequencing assay that is robust against environmental DNA contamination
2022
Overview
Metagenomic DNA sequencing is a powerful tool to characterize microbial communities but is sensitive to environmental DNA contamination, in particular when applied to samples with low microbial biomass. Here, we present Sample-Intrinsic microbial DNA Found by Tagging and sequencing (SIFT-seq) a metagenomic sequencing assay that is robust against environmental DNA contamination introduced during sample preparation. The core idea of SIFT-seq is to tag the DNA in the sample prior to DNA isolation and library preparation with a label that can be recorded by DNA sequencing. Any contaminating DNA that is introduced in the sample after tagging can then be bioinformatically identified and removed. We applied SIFT-seq to screen for infections from microorganisms with low burden in blood and urine, to identify COVID-19 co-infection, to characterize the urinary microbiome, and to identify microbial DNA signatures of sepsis and inflammatory bowel disease in blood.
The accuracy of metagenomic DNA sequencing is limited by environmental DNA contamination. Here, the authors develop and test SIFT-seq, a metagenomic DNA sequencing assay that allows to identify and remove environmental DNA contamination introduced during sample preparation.
