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DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
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Generating Whole Bacterial Genomes from Clinical Samples using a Target Enrichment Workflow
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Obtaining High Quality DNA from Diverse Clinical Samples.

Rachael Melton-Kreft1, Tracy Spirk1

  • 1Center of Excellence in Biofilm Research, Allegheny Singer Research Institute, Allegheny Health Network, Pittsburgh, Pennsylvania.

Current Protocols in Microbiology
|February 9, 2016
PubMed
Summary

High-quality nucleic acid isolation from clinical samples is crucial for accurate molecular diagnostics. This study details optimized sampling and DNA extraction methods for challenging specimens, ensuring representative results for downstream applications.

Keywords:
DNA isolationbacterial lysisclinical sampleshomogenizationnucleic acidsonicationtissue lysis

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Area of Science:

  • Clinical Microbiology
  • Molecular Diagnostics
  • Nucleic Acid Extraction

Background:

  • Nucleic acid quality is paramount for reliable clinical specimen analysis.
  • Current methods may yield non-representative nucleic acids due to sampling limitations.
  • Complex clinical matrices pose challenges to bacterial DNA isolation.

Purpose of the Study:

  • To present optimized protocols for nucleic acid sampling and isolation from diverse clinical specimens.
  • To ensure the quality and representativeness of extracted nucleic acids.
  • To facilitate downstream molecular analyses, including PCR-MS-ESI-TOF.

Main Methods:

  • Detailed protocols for tissue and explanted hardware sampling.
  • DNA isolation techniques addressing challenging matrices like scar tissue, bone, and biofilms.
  • Validation of methods for downstream molecular applications.

Main Results:

  • Established robust sampling techniques for comprehensive specimen surveying.
  • Developed effective DNA isolation protocols for difficult clinical samples.
  • Demonstrated the utility of isolated nucleic acids in advanced molecular techniques.

Conclusions:

  • Optimized sampling and nucleic acid isolation are critical for accurate clinical insights.
  • The presented protocols enhance the reliability of bacterial detection and characterization.
  • These methods support advanced molecular applications for improved patient diagnostics.