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Challenges in the Microbiological Diagnosis of Implant-Associated Infections: A Summary of the Current Knowledge
Alessandra Oliva1, Maria Claudia Miele1, Dania Al Ismail1
1Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy.
Abstract:
Implant-associated infections are characterized by microbial biofilm formation on implant surface, which renders the microbiological diagnosis challenging and requires, in the majority of cases, a complete device removal along with a prolonged antimicrobial therapy. Traditional cultures have shown unsatisfactory sensitivity and a significant advance in the field has been represented by both the application of the sonication technique for the detachment of live bacteria from biofilm and the implementation of metabolic and molecular assays. However, despite the recent progresses in the microbiological diagnosis have considerably reduced the rate of culture-negative infections, still their reported incidence is not negligible. Overall, several culture- and non-culture based methods have been developed for diagnosis optimization, which mostly relies on pre-operative and intra-operative (i.e., removed implants and surrounding tissues) samples. This review outlines the principal culture- and non-culture based methods for the diagnosis of the causative agents of implant-associated infections and gives an overview on their application in the clinical practice. Furthermore, advantages and disadvantages of each method are described.
Insights
Diagnosing implant-associated infections is challenging due to microbial biofilms. This review details culture- and non-culture based methods, including sonication and molecular assays, to improve detection and patient outcomes.
Area of Science:
- Microbiology
- Infectious Diseases
- Biomaterials
Background:
- Implant-associated infections involve microbial biofilm formation on device surfaces.
- Diagnosis is difficult, often necessitating device removal and extended antibiotic treatment.
- Traditional culture methods exhibit low sensitivity for biofilm-associated pathogens.
Purpose of the Study:
- To review culture- and non-culture based diagnostic methods for implant-associated infections.
- To evaluate the application and clinical utility of various diagnostic techniques.
- To outline the advantages and disadvantages of each diagnostic approach.
Main Methods:
- Sonication technique for bacterial detachment from biofilms.
- Metabolic and molecular assays for microbial identification.
- Analysis of pre-operative and intra-operative samples (implants, surrounding tissues).
Main Results:
- Advanced methods like sonication and molecular assays improve detection rates.
- Despite progress, culture-negative infections remain a concern.
- A range of diagnostic tools exist for optimizing implant infection diagnosis.
Conclusions:
- Optimized diagnostic strategies are crucial for managing implant-associated infections.
- Combining culture and non-culture based methods enhances diagnostic accuracy.
- Further refinement of diagnostic techniques is needed to reduce infection rates and improve patient care.
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