Sonication cultures of explanted components as an add-on test to routinely conducted microbiological diagnostics...

Area of Science:

• Orthopedics
• Infectious Diseases
• Microbiology

Background:

• Prosthetic joint infections (PJIs) pose a significant challenge in orthopedic surgery.
• Accurate pathogen detection is crucial for effective PJI management and treatment.
• Conventional tissue culture methods may have limitations in identifying all causative pathogens.

Purpose of the Study:

• To evaluate the feasibility and effectiveness of the sonication fluid culture method for pathogen detection in routine clinical practice.
• To compare the diagnostic yield of sonication culture with conventional tissue culture in patients with suspected prosthetic or implant infections.

Main Methods:

• Explanted components from 60 patients with suspected PJI were sonicated to dislodge bacteria.
• Sonication fluid and conventional tissue samples were cultured for pathogen identification.
• Sensitivity of sonication culture was compared to tissue culture, considering antibiotic therapy status.

Main Results:

• Sonication fluid culture demonstrated a sensitivity of 83.3%, higher than single (72.2%) or multiple (61.1%) positive tissue cultures.
• The sonication method significantly increased the detection rate of prosthetic joint infections (p = 0.008).
• This improvement was observed even in patients on antibiotic therapy (p = 0.016).

Conclusions:

• The sonication culture method is a valuable and feasible add-on for enhanced pathogen detection in prosthetic joint infections.
• Sonication culture improves diagnostic accuracy, especially in challenging cases or when patients have received antibiotics.
• This technique offers a significant advantage over conventional tissue culture alone for PJI diagnosis.