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Novel Diagnostics in Revision Arthroplasty: Implant Sonication and Multiplex Polymerase Chain Reaction
Published on: December 3, 2017
Pathogenic organisms in hip joint infections
1Institute of Medical Microbiology and Hygiene, University of Saarland Hospital, Homburg, Germany. dr.udo.geipel@uks.eu
Abstract:
Infections of the hip joint are usually of bacterial etiology. Only rarely, an infectious arthritis is caused in this localization by viruses or fungi. Native joint infections of the hip are less common than infections after implantation of prosthetic devices. Difficulties in prosthetic joint infections are, (I) a higher age of patients, and, thus an associated presence of other medical risk factors, (II) often long courses of treatment regimes depending on the bacterium and its antibiotic resistance, (III) an increased mortality, and (IV) a high economic burden for removal and reimplantation of an infected prosthetic device. The pathogenic mechanisms responsible for articular infections are well studied only for some bacteria, e.g. Staphylococcus aureus, while others are only partially understood. Important known bacterial properties and microbiological characteristics of infection are the bacterial adhesion on the native joint or prosthetic material, the bacterial biofilm formation, the development of small colony variants (SCV) as sessile bacterial types and the increasing resistance to antibiotics.
Insights
Bacterial hip joint infections, especially in prosthetic devices, present significant challenges including patient age, complex treatment, increased mortality, and economic burden. Understanding bacterial properties like biofilm formation and antibiotic resistance is crucial for effective management.
Area of Science:
- Orthopedics
- Infectious Diseases
- Microbiology
Background:
- Hip joint infections are predominantly bacterial, with viral or fungal causes being rare.
- Prosthetic joint infections are more common and complex than native joint infections.
- Challenges in prosthetic joint infections include patient comorbidities, prolonged treatment, higher mortality, and significant economic costs.
Purpose of the Study:
- To review the challenges and pathogenic mechanisms of bacterial hip joint infections, particularly in prosthetic devices.
- To highlight key bacterial properties contributing to infection, such as adhesion, biofilm formation, and antibiotic resistance.
Main Methods:
- Literature review of bacterial hip joint infections.
- Analysis of pathogenic mechanisms and bacterial characteristics.
Main Results:
- Bacterial etiology is the primary cause of hip joint infections.
- Prosthetic joint infections are associated with increased patient age, comorbidities, and treatment complexity.
- Bacterial adhesion, biofilm formation, small colony variants (SCVs), and antibiotic resistance are critical factors in infection pathogenesis.
Conclusions:
- Effective management of hip joint infections requires a deep understanding of bacterial virulence factors and resistance patterns.
- Addressing challenges in prosthetic joint infections necessitates strategies to combat biofilm formation and antibiotic resistance.
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