ArticleJournal of visualized experiments : JoVE2025
Mycobacterial DNA Extraction using Bead Beating in Custom Buffer Followed by NGS Workflow.
Article in Journal of visualized experiments : JoVE, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
Tuberculosis is a deadly disease, and the emergence of antibiotic drug resistance in the causative agent bacterium, Mycobacterium tuberculosis, worsens treatment outcomes. Precise and rapid drug resistance identification through sequencing technologies is needed to improve tuberculosis patient outcomes through tailored therapeutic regimens. The DNA extraction method is critical for downstream molecular assays and is complicated by the tough cell wall of Mycobacterium, the low bacillary load of many clinical samples, and the complexity of the sputum matrix. There are numerous M. tuberculosis DNA extraction methods reported, but there is currently no gold standard. Furthermore, few of these methods are shown to work consistently, and many are not suitable for low-resource and high-burden tuberculosis settings. Consequently, laboratories frequently introduce their own procedure modifications, resulting in significant method variability. Here, we present a cost-effective, rapid, and standardized protocol for Mycobacterial DNA extraction from both clinical sputum and culture that produces DNA suitable for qPCR, and which should be considered for use in clinical diagnostics laboratories.
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