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Nanopore-Based Metagenomic Sequencing in Respiratory Tract Infection: A Developing Diagnostic Platform

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LUNG
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SPRINGER
DOI: 10.1007/s00408-023-00612-y

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Nanopore sequencing; Next generation sequencing; Respiratory tract infection; Diagnostics; Mycobacteria; Tuberculosis; Antimicrobial stewardship

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Respiratory tract infection (RTI) is a significant global cause of morbidity and mortality. Traditional culture-based methods for identifying pathogens in respiratory samples are slow and prolong the use of broad-spectrum antimicrobial therapy. Nanopore sequencing (NPS) offers faster and more efficient pathogen identification and antimicrobial resistance profiling. However, there are questions regarding the clinical utility and implementation of NPS in RTI diagnostics.
Respiratory tract infection (RTI) remains a significant cause of morbidity and mortality across the globe. The optimal management of RTI relies upon timely pathogen identification via evaluation of respiratory samples, a process which utilises traditional culture-based methods to identify offending microorganisms. This process can be slow and often prolongs the use of broad-spectrum antimicrobial therapy, whilst also delaying the introduction of targeted therapy as a result. Nanopore sequencing (NPS) of respiratory samples has recently emerged as a potential diagnostic tool in RTI. NPS can identify pathogens and antimicrobial resistance profiles with greater speed and efficiency than traditional sputum culture-based methods. Increased speed to pathogen identification can improve antimicrobial stewardship by reducing the use of broad-spectrum antibiotic therapy, as well as improving overall clinical outcomes. This new technology is becoming more affordable and accessible, with some NPS platforms requiring minimal sample preparation and laboratory infrastructure. However, questions regarding clinical utility and how best to implement NPS technology within RTI diagnostic pathways remain unanswered. In this review, we introduce NPS as a technology and as a diagnostic tool in RTI in various settings, before discussing the advantages and limitations of NPS, and finally what the future might hold for NPS platforms in RTI diagnostics.

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