Rapid Nanopore Sequencing to Identify Bacteria Causing Prosthetic Joint Infections

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.