Articles | Volume 11, issue 2
https://doi.org/10.5194/jbji-11-161-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jbji-11-161-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Combined analysis of host immune response, biofilm genes, and 16S rRNA detection in fracture-related infection: an observational cohort study
Melissa Depypere
CORRESPONDING AUTHOR
Department of laboratory medicine, University Hospitals Leuven, 3000, Leuven, Belgium
Department of Microbiology, Immunology and Transplantation, Laboratory of Clinical Bacteriology and Mycology, KU Leuven, Leuven, Belgium
Jonathan Sliepen
Department of Trauma Surgery, University Medical Center Groningen, Groningen, the Netherlands
Jolien Onsea
Department of Trauma Surgery, University Hospitals Leuven, 3000 Leuven, Belgium
Department of Development and Regeneration, KU Leuven – University of Leuven, 3000 Leuven, Belgium
Yves Debaveye
Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
T. Fintan Moriarty
AO Research Institute Davos, Davos, Switzerland
Elena Della Bella
AO Research Institute Davos, Davos, Switzerland
Emmanuel André
Department of laboratory medicine, University Hospitals Leuven, 3000, Leuven, Belgium
Department of Microbiology, Immunology and Transplantation, Laboratory of Clinical Bacteriology and Mycology, KU Leuven, Leuven, Belgium
Johan Van Weyenbergh
Department of Microbiology, Immunology and Transplantation, Laboratory of Clinical and Epidemiological Virology, Rega Institute, KU Leuven, Leuven, Belgium
Willem-Jan Metsemakers
Department of Trauma Surgery, University Hospitals Leuven, 3000 Leuven, Belgium
Department of Development and Regeneration, KU Leuven – University of Leuven, 3000 Leuven, Belgium
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Skin commensal bacteria such as staphylococci are often the source of orthopaedic-device-related infections. Rifampicin is a widely used antibiotic in the treatment of these infections. The results of this study show that oral rifampicin therapy leads to a consistent and persistent induction of resistance in commensal staphylococci on the skin and in the nose for a prolonged time.
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J. Bone Joint Infect., 9, 167–171, https://doi.org/10.5194/jbji-9-167-2024, https://doi.org/10.5194/jbji-9-167-2024, 2024
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The article examines a unique case of Ureaplasma urealyticum causing osteomyelitis in the greater trochanter of a 26-year-old male treated with ocrelizumab for multiple sclerosis. It emphasizes the necessity of a multidisciplinary approach and advanced PCR diagnostics to manage such rare opportunistic infections effectively, highlighting the challenges faced due to the immunosuppressive nature of monoclonal antibody therapies of this kind.
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Septic arthritis (SA) of the native adult hip is a rare orthopaedic emergency. To date, the role of advanced imaging has been confined to supporting or opposing diagnosis; however, implications for surgical decision-making and outcomes have not yet been established. We found that extra-articular abscesses are present in two out of three patients and require varying anatomical approaches. Therefore, we recommend routinely performing advanced imaging in all adults with SA of the native hip joint.
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A total of 41 patients who underwent surgical treatment for septic arthritis (SA) of the native hip were studied. We show that patients with SA of the native hip can be divided in three distinct clinical subgroups based on route of infection. Route of infection is directly related to the chance of femoral head preservation and should, therefore, be the basis for decision-making. Only patients with blood-borne infections in an undamaged hip had a reasonable chance of femoral head preservation.
Niels Vanvelk, Esther M. M. Van Lieshout, Jolien Onsea, Jonathan Sliepen, Geertje Govaert, Frank F. A. IJpma, Melissa Depypere, Jamie Ferguson, Martin McNally, William T. Obremskey, Charalampos Zalavras, Michael H. J. Verhofstad, and Willem-Jan Metsemakers
J. Bone Joint Infect., 8, 133–142, https://doi.org/10.5194/jbji-8-133-2023, https://doi.org/10.5194/jbji-8-133-2023, 2023
Short summary
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This international retrospective cohort study displays the diagnostic characteristics of 609 patients who were treated for fracture-related infection (FRI). Clinical confirmatory criteria were present in 77% of patients. In the remaining patients, the decision to operatively collect deep tissue cultures had to be based on a set of suggestive criteria. The combined use of these suggestive criteria should guide treating physicians in the management pathway of FRI.
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Short summary
The aim of this proof-of-concept study was to investigate host immune gene expression through transcriptome profiling in patients with fracture-related infection and to explore the feasibility of detecting 16S rRNA and biofilm-associated genes, an approach not previously applied using this method. This technique revealed distinct immune activation patterns in fracture-related infection (FRI) and enabled the identification of pathogens that were missed by conventional culture techniques.
The aim of this proof-of-concept study was to investigate host immune gene expression through...