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Rapid Nanopore Sequencing to Identify Bacteria Causing Prosthetic Joint Infections.

Hollie Wilkinson1,2, Karina Wright1,2, Helen S McCarthy1,2

  • 1The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry SY10 7AG, UK.

Antibiotics (Basel, Switzerland)
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Summary

Rapid nanopore sequencing aids in identifying bacteria causing prosthetic joint infections. Combining this method with traditional cultures significantly improves diagnostic accuracy for better patient treatment.

Keywords:
bacterial identificationnanopore sequencingprosthetic joint infection (PJI)

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Area of Science:

  • Medical Microbiology
  • Genomics
  • Infectious Diseases

Background:

  • Diagnosing prosthetic joint infections is challenging due to unreliable microbiological cultures.
  • False positives and negatives in current methods delay appropriate treatment.
  • There is a need for more accurate and timely diagnostic tools.

Purpose of the Study:

  • To evaluate the utility of rapid nanopore sequencing for identifying bacteria in prosthetic joint infections.
  • To compare nanopore sequencing with traditional culture methods.
  • To assess the combined diagnostic performance of both methods.

Main Methods:

  • DNA extracted from joint fluid aspirates of 19 patients undergoing revision surgery.
  • Rapid nanopore sequencing performed using the MinION device.
  • Bioinformatic analysis of sequencing data, including human read filtering and sequence classification.
  • Comparison with European Bone and Joint Infection Society criteria.

Main Results:

  • Nanopore sequencing achieved 74% accuracy in bacterial identification.
  • Traditional cultures showed 68% accuracy.
  • Combining nanopore sequencing with cultures yielded 94% accuracy (F1 score 96%).

Conclusions:

  • Nanopore sequencing shows promise as a supplementary tool for diagnosing prosthetic joint infections.
  • The combination of nanopore sequencing and cultures significantly enhances diagnostic accuracy.
  • This approach could lead to more timely and effective treatment strategies.