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Evaluating next-generation sequencing for direct clinical diagnostics in diarrhoeal disease
K G Joensen1,2, A L Ø Engsbro3,4, O Lukjancenko1
1National Food Institute, Division for Epidemiology and Microbial Genomics, Technical University of Denmark, Søltofts Plads, Building 221, 2800, Kgs. Lyngby, Denmark.
Summary
Next-generation sequencing (NGS) shows promise for diagnosing infectious diarrhea by analyzing fecal samples. While comparable to conventional methods, NGS is currently too costly and slow for routine clinical use.
Area of Science:
- Microbiology
- Genomics
- Infectious Diseases
Background:
- Accurate microbiological diagnosis of diarrhea is crucial for timely clinical management.
- Current diagnostic methods often fail to identify pathogens quickly.
- Next-generation sequencing (NGS) offers a potential advancement in diagnostic capabilities.
Purpose of the Study:
- To evaluate the potential of NGS for diagnosing diarrhea through direct sequencing of fecal samples.
- To compare NGS-based diagnostics with conventional methods in a clinical setting.
Main Methods:
- DNA extraction from 58 clinical fecal samples and 10 healthy controls.
- Sequencing using the Illumina MiSeq system.
- Pathogen identification and abundance analysis using MGmapper software.
- Comparison of NGS results with conventional diagnostic findings.
Main Results:
- NGS detected the same bacterial pathogens as conventional methods in 34 out of 38 positive samples.
- NGS identified potential pathogens in 5 of 11 conventionally negative samples.
- Overall pathogen detection by NGS was comparable to conventional diagnostics.
Conclusions:
- NGS has the potential to be extended for comprehensive pathogen detection in diarrheal diseases.
- Current NGS technology is not yet cost-effective or time-efficient for routine diagnostic implementation.
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