Comparative Analysis of Microbial Detection in Traditional Culture Versus Metagenomic Next-Generation Sequencing in

Po-Yu Liu1, Hung-Jen Tang2, Susan Shin-Jung Lee3

  • 1Department of Internal Medicine, Taichung Veterans General Hospital, Taichung City 407, Taiwan.

Microorganisms
|January 28, 2026
PubMed

Insights

Metagenomic next-generation sequencing (mNGS) significantly improves pathogen detection in periprosthetic joint infection (PJI) compared to conventional methods. This advanced technique offers a valuable addition for diagnosing challenging PJI cases.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Genomics

Background:

  • Periprosthetic joint infection (PJI) diagnosis is challenging, often complicated by prior antibiotic use.
  • Conventional bacterial culture (CMT) has limitations in identifying causative pathogens.

Purpose of the Study:

  • To evaluate the diagnostic performance of metagenomic next-generation sequencing (mNGS) for PJI.
  • To compare mNGS with CMT in pathogen identification for PJI patients.

Main Methods:

  • Prospective analysis of 42 PJI patients across twelve Taiwanese hospitals (2022-2024).
  • Joint fluid and debrided tissue samples analyzed using both CMT and mNGS.
  • Demographic, laboratory, and clinical outcome data collected for analysis.

Main Results:

  • mNGS identified pathogens in 66.7% of cases, significantly higher than CMT's 28.6% (p=0.01).
  • Commonly detected genera included *Staphylococcus* and *Cutibacterium*.
  • Prior antibiotic use was prevalent (78.6%) in enrolled patients.

Conclusions:

  • mNGS demonstrates superior diagnostic capability for PJI compared to CMT.
  • mNGS is a valuable adjunctive tool for identifying pathogens in PJI.
  • Further integration of mNGS can enhance PJI management strategies.

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