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Ganta A, Tong Y, Boadi BI, Konda SR, Egol KA. Microbiome of infected fracture nonunion: Does it affect outcomes? J Orthop Sci 2024; 29:1270-1273. [PMID: 37839980 DOI: 10.1016/j.jos.2023.08.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 06/09/2023] [Accepted: 08/27/2023] [Indexed: 10/17/2023]
Abstract
BACKGROUND Infected fracture nonunions often require prolonged treatment and recovery courses. It is unclear whether the bacterial microbiome influences the time to healing as well as the eradication of infection. The goals of this study are (1) to assess the bacterial microbiome affecting infected nonunions and (2) to evaluate the effects of bacterial speciation on associated outcomes. METHODS Between 2006 and 2022, data from 551 adult patients from a single academic institution who presented with a fracture nonunion were analyzed retrospectively for infection. All patients underwent revision surgery with three sets of cultures obtained intra-operatively. Patients with significant intra-operative cultures were grouped into gram-positive and gram-negative culture cohorts. These patients were managed with a standardized protocol involving surgical debridement, nonunion site fixation, and culture-directed antibiotic treatment. Primary outcome was time to fracture union. Secondary outcomes included number of re-operations and eventual amputation or reconstructive surgery. RESULTS 56 nonunion patients (10 %) were diagnosed with an infected nonunion (44 g-positive, 12 g-negative). Of these, 3 g-positive patients received an amputation or arthroplasty procedure prior to fracture union, and seven were lost to follow-up. There were no significant differences in age, gender, or nonunion site between cohorts. Most nonunions occurred in the lower extremity. The most common bacteria were staph species (54.3 %). 36 g-positive and 10 g-negative patients achieved fracture union. Time to union was on average 158.4 days longer in the gram-negative cohort-but did not reach statistical significance (446.8 days gram-positive, 662.3 days gram-negative, p = 0.69). There was no difference in re-operation rates (1.9 % gram-positive, 2.2 % gram-negative, p = 0.84). CONCLUSIONS Patients with infected nonunions had wide-ranging bacterial contamination that were treated successfully using a standardized protocol. However, patients with any gram-negative culture trended toward a delay in time to union.
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Affiliation(s)
- Abhishek Ganta
- NYU Langone Orthopedic Hospital, Department of Orthopedics, New York, NY, USA; Jamaica Hospital Medical Center, Queens, NY, USA.
| | - Yixuan Tong
- NYU Langone Orthopedic Hospital, Department of Orthopedics, New York, NY, USA
| | - Blake I Boadi
- NYU Langone Orthopedic Hospital, Department of Orthopedics, New York, NY, USA
| | - Sanjit R Konda
- NYU Langone Orthopedic Hospital, Department of Orthopedics, New York, NY, USA; Jamaica Hospital Medical Center, Queens, NY, USA
| | - Kenneth A Egol
- NYU Langone Orthopedic Hospital, Department of Orthopedics, New York, NY, USA
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Alt V, Gessner A, Merabishvili M, Hitzenbichler F, Mannala GK, Peterhoff D, Walter N, Pirnay JP, Hiergeist A, Rupp M. Case report: Local bacteriophage therapy for fracture-related infection with polymicrobial multi-resistant bacteria: hydrogel application and postoperative phage analysis through metagenomic sequencing. Front Med (Lausanne) 2024; 11:1428432. [PMID: 39071087 PMCID: PMC11272550 DOI: 10.3389/fmed.2024.1428432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Accepted: 06/20/2024] [Indexed: 07/30/2024] Open
Abstract
Fracture-related infections can be challenging, particularly with concomitant severe bone defects and multi-resistant microorganisms. We present a case of a 42-year-old patient with a fracture-related infection following a war injury from a gunshot, resulting in a 12-cm subtrochanteric segmental bone defect and the detection of four different multi-resistant Gram-negative bacteria. Due to antibiotic drug resistance, treatment with bacteriophages was considered. Phage susceptibility testing revealed the activity of a commercially available bacteriophage cocktail (Intesti bacteriophage, Eliava Institute, Tbilisi, Georgia). This phage cocktail was included in a modified two-stage Masquelet technique. During the first intervention, the bone was debrided and samples for microbiological and phage testing were harvested. The indwelling intramedullary rod was removed, and the bone defect was filled with a PMMA spacer loaded with colistin and the bone stabilized with a plate. During the second procedure, the PMMA spacer was removed and a silver-coated angular stable plate was implanted. The bone defect was filled with a fibular autograft and allograft cancellous bone chips. At the end of the procedure, the Intesti bacteriophage cocktail was injected into a DAC hydrogel and this bacteriophage hydrogel composite was then put onto the angular stable plate. Postoperatively the wound fluid was collected over 72 h, and high-throughput metagenomic sequencing was performed. This showed a time-dependent release of the bacteriophages in the wound fluid, with a relatively high concentration after 12 h, decreasing to DNA copies of 0 after 72 h. Furthermore, we have assessed the release of phages from DAC gel and the effect of DAC gel on the phages in vitro. The results showed a stable and rapid release of phages from the DAC gel (~1×103 PFU/mL). The clinical course of the patient showed no relapse of the infection with good bone consolidation of the bone defect after 1 year without the need for any surgical revision. To the best of our knowledge, this is the first case that shows the detection of bacteriophage DNA copies by high-throughput metagenomics sequencing in a patient with a complex fracture-related infection. Successful treatment of this case encourages further investigation of bacteriophage therapy in patients with complex bone and joint infections.
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Affiliation(s)
- Volker Alt
- Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany
| | - André Gessner
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Maya Merabishvili
- Laboratory for Molecular and Cellular Technology (LabMCT), Queen Astrid Military Hospital, Brussels, Belgium
| | - Florian Hitzenbichler
- Department of Infection Prevention and Infectious Diseases, University Hospital Regensburg, Regensburg, Germany
| | | | - David Peterhoff
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Nike Walter
- Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Jean-Paul Pirnay
- Laboratory for Molecular and Cellular Technology (LabMCT), Queen Astrid Military Hospital, Brussels, Belgium
| | - Andreas Hiergeist
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Markus Rupp
- Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany
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Alt V, Rupp M, Kerschbaum M, Prantl L, Geis S. [Treatment strategies for fracture-related infections with concurrent soft tissue damage]. UNFALLCHIRURGIE (HEIDELBERG, GERMANY) 2024; 127:103-109. [PMID: 38167783 DOI: 10.1007/s00113-023-01403-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/07/2023] [Indexed: 01/05/2024]
Abstract
Fracture-related infections are the predominant complication following surgical fracture treatment. The distal lower leg, e.g., in pilon tibial fractures, is at a high risk of infection due to poor soft tissue coverage, particularly in cases of open fractures in this area. Fracture-related infections with significant soft tissue damage require special attention alongside treatment of the infection itself. In general, the principle is that healing of fracture-related infection is not possible without sufficient soft tissue coverage. Therefore, it is crucial to integrate both soft tissue damage and fracture-related infection into a comprehensive treatment plan from the beginning. An interdiscpilinary treatment approach between trauma and plastic surgery is often necessary and beneficial. In cases, where fracture fixation devices or bone is exposed, mid- or long-term use of vacuum-assisted wound therapy is not advisable due to a higher risk of reinfection. Hence, an interdisciplinary treatment strategy involving trauma and plastic surgery should prioritize early soft tissue closure, referred to as the "orthoplastic approach". If this cannot be done in the own hospital, early patient transfer is indicated to ensure optimal interdisciplinary therapy with early soft tissue closure and simultaneous trauma surgical treatment to control the infection and enable bone healing. Free fasciocutaneous or muscle flap techniques in combination with adequate trauma surgical and antibiotic therapy lead to good reliable results in these situations.
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Affiliation(s)
- Volker Alt
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg (UKR), Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland.
| | - Markus Rupp
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg (UKR), Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - Maximilian Kerschbaum
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg (UKR), Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - Lukas Prantl
- Abteilung für Plastische, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Regensburg (UKR), Regensburg, Deutschland
| | - Sebastian Geis
- Abteilung für Plastische, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Regensburg (UKR), Regensburg, Deutschland
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Rupp M, Walter N, Bärtl S, Heyd R, Hitzenbichler F, Alt V. Fracture-Related Infection-Epidemiology, Etiology, Diagnosis, Prevention, and Treatment. DEUTSCHES ARZTEBLATT INTERNATIONAL 2024; 121:17-24. [PMID: 37970721 PMCID: PMC10916768 DOI: 10.3238/arztebl.m2023.0233] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 10/23/2023] [Accepted: 10/23/2023] [Indexed: 11/17/2023]
Abstract
BACKGROUND Fracture-related infection (FRI) is a challenge to physicians and other workers in health care. In 2018, there were 7253 listed cases of FRI in Germany, corresponding to an incidence of 10.7 cases per 100 000 persons per year. METHODS This review is based on pertinent publications retrieved from a search in PubMed with the search terms "fracture," "infection," "guideline," and "consensus." Aside from the primary literature, international guidelines and consensus recommendations were evaluated as well. RESULTS FRI arise mainly from bacterial contamination of the fracture site. Staphylococcus aureus is the most commonly detected pathogen. The treatment is based on surgery and antibiotics and should be agreed upon by an interdisciplinary team; it is often difficult because of biofilm formation. Treatment options include implant-preserving procedures and single-stage, two-stage, or multi-stage implant replacement. Treatment failure occurs in 10.3% to 21.4% of cases. The available evidence on the efficacy of various treatment approaches is derived mainly from retrospective cohort studies (level III evidence). Therefore, periprosthetic joint infections and FRI are often discussed together. CONCLUSION FRI presents an increasing challenge. Preventive measures should be optimized, and the treatment should always be decided upon by an interdisciplinary team. Only low-level evidence is available to date to guide diagnostic and treatment decisions. High-quality studies are therefore needed to help us meet this challenge more effectively.
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Affiliation(s)
- Markus Rupp
- These authors share first authorship
- Department for Trauma surgery, University Hospital Regensburg, Germany
| | - Nike Walter
- These authors share first authorship
- Department for Trauma surgery, University Hospital Regensburg, Germany
| | - Susanne Bärtl
- Department for Trauma surgery, University Hospital Regensburg, Germany
| | - Robert Heyd
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Germany
| | - Florian Hitzenbichler
- Department for Hospital hygiene and Infectiology, University Hospital Regensburg, Germany
| | - Volker Alt
- Department for Trauma surgery, University Hospital Regensburg, Germany
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Rupp M, Walter N, Baertl S, Lang S, Herbst T, Hitzenbichler F, Alt V. Antibiotic Prophylaxis and Empirical Antibiotic Therapy in Primary Arthroplasty and Periprosthetic Joint Infections: Current Practice and Need for Therapy Optimization. ZEITSCHRIFT FUR ORTHOPADIE UND UNFALLCHIRURGIE 2023; 161:654-659. [PMID: 35468647 DOI: 10.1055/a-1773-1382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The aim of the present work was to survey the situation of healthcare regarding the use of prophylactic and empirical antibiotics in primary arthroplasty and treatment of periprosthetic joint infections (PJI). For this purpose, a survey was conducted at German university and occupational accident hospitals. Survey data was compared to previously published data on the antimicrobial regimes of PJI (n=81) patients (n=81) treated in our department between 2017 and 2020. A homogeneous picture emerged for the prophylactic administration of antibiotics in the context of primary arthroplasty. In 93.2% (elective) and 88.6% (fracture treatment) of the hospitals, first or second generation cephalosporins were administered perioperatively for infection prophylaxis in primary hip arthroplasty. The empirical antibiotic treatment of PJIs showed a clearly inhomogeneous therapeutic picture. Monotherapy with an aminopenicillin plus a beta-lactamase inhibitor is used most frequently (38.7%); first and second generation cephalosporins are used second most frequently as monotherapy (18.2%). In light of the global problem of antibiotic multi-resistance, clinical use of antibiotics has to be reasonable and effective. The present results highlight the further need to improve awareness and following existing guidelines in the administration of empirical antibiotic therapy in PJI.
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Affiliation(s)
- Markus Rupp
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg, Regensburg, Deutschland
| | - Nike Walter
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg, Regensburg, Deutschland
| | - Susanne Baertl
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg, Regensburg, Deutschland
| | - Siegmund Lang
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg, Regensburg, Deutschland
| | - Tanja Herbst
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg, Regensburg, Deutschland
| | - Florian Hitzenbichler
- Abteilung für Krankenhaushygiene und Infektiologie, Universitätsklinikum Regensburg, Regensburg, Deutschland
| | - Volker Alt
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg, Regensburg, Deutschland
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Qamar MU, Rizwan M, Uppal R, Khan AA, Saeed U, Ahmad K, Iqbal MJ, Ali Z, Suleman M. Antimicrobial susceptibility and clinical characteristics of multidrug-resistant polymicrobial infections in Pakistan, a retrospective study 2019-2021. Future Microbiol 2023; 18:1265-1277. [PMID: 37882773 DOI: 10.2217/fmb-2023-0110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 07/24/2023] [Indexed: 10/27/2023] Open
Abstract
Background: We determined the prevalence of antimicrobial resistance (AMR) in polymicrobial pathogens in Pakistan. Methods: A total of 70,518 clinical samples were collected aseptically and confirmation of isolates and antibiogram were performed by the VITEK 2 system. Results: Of 70,518 samples, 441 (0.62%) were polymicrobial samples, with 882 (1.2%) polymicrobial pathogens with 689 (78.1%) Gram-negative rods (GNRs), 166 (18.8%) Gram-positive cocci and 27 (3.1%) Candida albicans. Among GNRs, 28.8% were Escherichia coli and 25.9% were Klebsiella pneumoniae. Majority, 15.1% of Pseudomonas aeruginosa and K. pneumoniae were found in combination. 30.1% of isolates were ESBL producers, 9.7% carbapenem-resistant organisms, 35.5% MRSA and 6.0% VRE. 100% of E. coli were resistant to ampicillin and 98% of K. pneumoniae were resistant to piperacillin. Conclusion: A high prevalence of AMR in polymicrobial pathogens was observed.
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Affiliation(s)
- Muhammad Usman Qamar
- Institute of Microbiology, Faculty of Life Sciences, Government College University Faisalabad, 38000, Pakistan
| | - Muhammad Rizwan
- Department of Pathology, Islamabad Diagnostic Center, Faisalabad, 38000, Pakistan
| | - Rizwan Uppal
- Department of Pathology, Islamabad Diagnostic Center, Islamabad, Pakistan
| | - Aftab Ahmad Khan
- Department of Pathology, Islamabad Diagnostic Center, Islamabad, Pakistan
| | - Umar Saeed
- Department of Pathology, Islamabad Diagnostic Center, Islamabad, Pakistan
- Department of Clinical and Biomedical Research Center, Foundation University School of Health Sciences, Foundation University Islamabad, Pakistan
| | - Khurshid Ahmad
- Department of Pathology, Islamabad Diagnostic Center, Islamabad, Pakistan
| | | | - Zuhaib Ali
- Department of Pathology, Islamabad Diagnostic Center, Islamabad, Pakistan
| | - Muhammad Suleman
- Department of Pathology, Islamabad Diagnostic Center, Islamabad, Pakistan
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Rupp M, Walter N, Szymski D, Taeger C, Langer M, Alt V. The antibiotic bead pouch - a useful technique for temporary soft tissue coverage, infection prevention and therapy in trauma surgery. J Bone Jt Infect 2023; 8:165-173. [PMID: 37818255 PMCID: PMC10561378 DOI: 10.5194/jbji-8-165-2023] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 05/23/2023] [Indexed: 10/12/2023] Open
Abstract
Soft tissue defects resulting from trauma and musculoskeletal infections can complicate surgical treatment. Appropriate temporary coverage of these defects is essential to achieve the best outcomes for necessary plastic soft tissue defect reconstruction. The antibiotic bead pouch technique is a reasonable surgical approach for managing temporary soft tissue defects following adequate surgical debridement. This technique involves the use of small diameter antibiotic-loaded bone cement beads to fill the dead space created by debridement. By applying antibiotics to the bone cement and covering the beads with an artificial skin graft, high local dosages of antibiotics can be achieved, resulting in the creation of a sterile wound that offers the best starting position for soft tissue and bone defect reconstruction. This narrative review describes the rationale for using this technique, including its advantages and disadvantages, as well as pearls and pitfalls associated with its use in daily practice. In addition, the article provides a comprehensive overview of the literature that has been published since the technique was introduced in surgical practice.
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Affiliation(s)
- Markus Rupp
- Department of Trauma Surgery, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
| | - Nike Walter
- Department of Trauma Surgery, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
| | - Dominik Szymski
- Department of Trauma Surgery, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
| | - Christian Taeger
- Plastische Chirurgie & Ästhetik an der Isar, Widenmayerstraße 16, 80538 Munich, Germany
| | - Martin Franz Langer
- Department of Trauma, Hand and Reconstructive Surgery, Waldeyerstrasse 1, 48149 Muenster, Germany
| | - Volker Alt
- Department of Trauma Surgery, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
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Rupp M, Walter N, Popp D, Hitzenbichler F, Heyd R, Geis S, Kandulski M, Thurn S, Betz T, Brochhausen C, Alt V. Multidisciplinary Treatment of Fracture-Related Infection Has a Positive Impact on Clinical Outcome-A Retrospective Case Control Study at a Tertiary Referral Center. Antibiotics (Basel) 2023; 12:antibiotics12020230. [PMID: 36830141 PMCID: PMC9952612 DOI: 10.3390/antibiotics12020230] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVES Fracture-related infection (FRI) is a major complication in orthopedic and trauma surgery. The management and choice of treatment can be difficult depending on multiple factors. Therefore, we implemented a weekly multidisciplinary team discussion to determine diagnostic and treatment strategies in FRI patients and aimed to analyze its effect on clinical outcomes. METHODS Clinical outcomes of FRI patients treated before and after implementation of a structured multidisciplinary treatment (MDT) approach with a weekly case discussion were compared at a follow-up of 12 months. RESULTS In total, n = 117 were eligible for enrolment, whereby n = 58 patients (72.4% male, mean age 56.7 ± 16.8 years) constituted the MDT group and n = 59 patients (72.9% male, mean age 55.0 ± 16.5 years) the control group. In the MDT group more cases were treated with local antibiotics (67.2% vs. 27.1%, p < 0.001) and significant less amputations (3.4% vs. 6.8%, p = 0.014), as well as less revision surgeries (1.5 ± 1.2 (0-5) vs. 2.2 ± 1.2 (0-7), p = 0.048) were performed. A trend towards less debridement, antibiotics and implant retention (DAIR) procedures, lower rates of recurrence of infection and less treatment failures in the MDT group was observable, even though not statistically significant. CONCLUSION An MDT approach providing a patient tailored treatment concept in the treatment of FRI patients appears to be beneficial for the affected patients. Quality and efficacy of implemented MDT meetings should further be evaluated to provide sufficient evidence to further implement this valuable tool in clinical practice and decision making.
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Affiliation(s)
- Markus Rupp
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
- Correspondence: (M.R.); (N.W.)
| | - Nike Walter
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
- Department for Psychosomatic Medicine, University Hospital Regensburg, 93053 Regensburg, Germany
- Correspondence: (M.R.); (N.W.)
| | - Daniel Popp
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Florian Hitzenbichler
- Department of Infection Prevention and Infectious Diseases, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Robert Heyd
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Sebastian Geis
- Center of Plastic and Aesthetic, Hand and Reconstructive Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Melanie Kandulski
- Department of Internal Medicine I, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Sylvia Thurn
- Institute of Radiology, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Thomas Betz
- Department of Vascular Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Christoph Brochhausen
- Institute of Pathology, University Regensburg, 93053 Regensburg, Germany
- Institute of Pathology, University Medical Center, 68167 Mannheim, Germany
| | - Volker Alt
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
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Depypere M, Sliepen J, Onsea J, Debaveye Y, Govaert GAM, IJpma FFA, Zimmerli W, Metsemakers WJ. The Microbiological Etiology of Fracture-Related Infection. Front Cell Infect Microbiol 2022; 12:934485. [PMID: 35873162 PMCID: PMC9300981 DOI: 10.3389/fcimb.2022.934485] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 06/14/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose Fracture-related infection (FRI) is an important complication related to orthopaedic trauma. Although the scientific interest with respect to the diagnosis and treatment of FRI is increasing, data on the microbiological epidemiology remains limited. Therefore, the primary aim of this study was to evaluate the microbiological epidemiology related to FRI, including the association with clinical symptoms and antimicrobial susceptibility data. The secondary aim was to analyze whether there was a relationship between the time to onset of infection and the microbiological etiology of FRI. Methods FRI patients treated at the University Hospitals of Leuven, Belgium, between January 1st 2015 and November 24th 2019 were evaluated retrospectively. The microbiological etiology and antimicrobial susceptibility data were analyzed. Patients were classified as having an early (<2 weeks after implantation), delayed (2-10 weeks) or late-onset (> 10 weeks) FRI. Results One hundred ninety-one patients with 194 FRIs, most frequently involving the tibia (23.7%) and femur (18.6%), were included. Staphylococcus aureus was the most frequently isolated pathogen, regardless of time to onset (n=61; 31.4%), followed by S. epidermidis (n=50; 25.8%) and non-epidermidis coagulase-negative staphylococci (n=35; 18.0%). Polymicrobial infections (n=49; 25.3%), mainly involving Gram negative bacilli (GNB) (n=32; 65.3%), were less common than monomicrobial infections (n=138; 71.1%). Virulent pathogens in monomicrobial FRIs were more likely to cause pus or purulent discharge (n=45;54.9%; p=0.002) and fistulas (n=21;25.6%; p=0.030). Susceptibility to piperacillin/tazobactam for GNB was 75.9%. Vancomycin covered 100% of Gram positive cocci. Conclusion This study revealed that in early FRIs, polymicrobial infections and infections including Enterobacterales and enterococcal species were more frequent. A time-based FRI classification is not meaningful to estimate the microbiological epidemiology and cannot be used to guide empiric antibiotic therapy. Large multicenter prospective studies are necessary to gain more insight into the added value of (broad) empirical antibiotic therapy.
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Affiliation(s)
- Melissa Depypere
- Department of laboratory medicine, University Hospitals Leuven, 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, Netherlands
| | - Jolien Onsea
- Department of Trauma Surgery, University Hospitals Leuven, Leuven, Belgium
- Department of Development and Regeneration, KU Leuven - University of Leuven, Leuven, Belgium
| | - Yves Debaveye
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Geertje A. M. Govaert
- Department of Trauma Surgery, University of Utrecht, University Medical Center Utrecht, Utrecht, Netherlands
| | - Frank F. A. IJpma
- Department of Trauma Surgery, University Medical Center Groningen, Groningen, Netherlands
| | - Werner Zimmerli
- Basel University Medical Clinic, Kantonsspital Baselland, Liestal, Switzerland
| | - Willem-Jan Metsemakers
- Department of Trauma Surgery, University Hospitals Leuven, Leuven, Belgium
- Department of Development and Regeneration, KU Leuven - University of Leuven, Leuven, Belgium
- *Correspondence: Willem-Jan Metsemakers,
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Baertl S, Walter N, Engelstaedter U, Ehrenschwender M, Hitzenbichler F, Alt V, Rupp M. What Is the Most Effective Empirical Antibiotic Treatment for Early, Delayed, and Late Fracture-Related Infections? Antibiotics (Basel) 2022; 11:287. [PMID: 35326751 PMCID: PMC8944514 DOI: 10.3390/antibiotics11030287] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/14/2022] [Accepted: 02/21/2022] [Indexed: 12/28/2022] Open
Abstract
Antibiotic treatment strategies for fracture-related infections (FRI) are often extrapolated from periprosthetic joint infections (PJI), although, in contrast to PJI, detailed analysis of pathogens and their antibiotic resistance is missing. Therefore, this study aimed to investigate antibiotic susceptibility profiles to identify effective empiric antibiotic treatment for early-, delayed-, and late-onset FRI. Patients treated for FRI from 2013 to 2020 were grouped into early (<2 weeks), delayed (3−10 weeks), and late (>10 weeks) onset of infection. Antibiotic susceptibility profiles were examined with respect to broadly used antibiotics and antibiotic combinations. In total, 117 patients (early n = 19, delayed n = 60, late n = 38) were enrolled. In early-onset FRI, 100.0% efficacy would be achieved by meropenem + vancomycin, gentamicin + vancomycin, co-amoxiclav + glycopeptide, ciprofloxacin + glycopeptide and piperacillin/tazobactam + glycopeptide. For patients with delayed FRI, the highest susceptibility was revealed for meropenem + vancomycin, gentamicin + vancomycin and ciprofloxacin + glycopeptide (96.7%). Meropenem + vancomycin was the most effective empiric antimicrobial in patients with late-onset of infection with 92.1% coverage. No subgroup differences in antibiotic sensitivity profiles were observed except for the combination ciprofloxacin + glycopeptide, which was significantly superior in early FRI (F = 3.304, p = 0.04). Across all subgroups meropenem + vancomycin was the most effective empiric treatment in 95.7% of patients with confirmed susceptibility. Meropenem + vancomycin, gentamicin + vancomycin, co-amoxiclav + glycopeptide are the best therapeutic options for FRI, regardless of the onset of infection. To avoid multidrug resistance, established antibiotic combinations such as co-amoxiclav with a glycopeptide seem to be reasonable as a systemic antibiotic therapy, while vancomycin + gentamicin could be implemented in local antibiotic therapy to reduce adverse events during treatment.
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Affiliation(s)
- Susanne Baertl
- Department for Trauma Surgery, University Hospital, 93053 Regensburg, Germany; (S.B.); (N.W.); (U.E.); (V.A.)
| | - Nike Walter
- Department for Trauma Surgery, University Hospital, 93053 Regensburg, Germany; (S.B.); (N.W.); (U.E.); (V.A.)
- Department for Psychosomatic Medicine, University Hospital, 93053 Regensburg, Germany
| | - Ulrike Engelstaedter
- Department for Trauma Surgery, University Hospital, 93053 Regensburg, Germany; (S.B.); (N.W.); (U.E.); (V.A.)
| | - Martin Ehrenschwender
- Institute of Laboratory Medicine, Microbiology and Hygiene, Hospital of the Order of St. John, 93053 Regensburg, Germany;
| | - Florian Hitzenbichler
- Department of Infection Prevention and Infectious Diseases, University Hospital, 93053 Regensburg, Germany;
| | - Volker Alt
- Department for Trauma Surgery, University Hospital, 93053 Regensburg, Germany; (S.B.); (N.W.); (U.E.); (V.A.)
| | - Markus Rupp
- Department for Trauma Surgery, University Hospital, 93053 Regensburg, Germany; (S.B.); (N.W.); (U.E.); (V.A.)
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11
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Rupp M, Kern S, Walter N, Anastasopoulou L, Schnettler R, Heiss C, Alt V. Surgical treatment outcome after serial debridement of infected nonunion-A retrospective cohort study. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY & TRAUMATOLOGY : ORTHOPEDIE TRAUMATOLOGIE 2022; 32:183-189. [PMID: 33772662 PMCID: PMC8741665 DOI: 10.1007/s00590-021-02930-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/06/2021] [Indexed: 11/15/2022]
Abstract
PURPOSE Reported outcome after multiple staged surgical treatment of infected nonunion is scarce. We, therefore, asked: (1) What is the clinical outcome in infected nonunion patients after multiple staged revision surgery? (2) Are different pathogens evidenced after surgical treatment in patients who have undergone more or less surgeries? METHODS All enrolled patients were surgically treated for long bone-infected nonunion between January 2010 and March 2018. Besides patients´ demographics outcome in terms of bony consolidation and major complications defined as death during inward treatment, amputation and recurrence of infection during follow-up of at least 12 months were assessed. Microbiological findings were assessed and compared between two groups with less than five versus five or more surgical revisions. RESULTS Bone consolidation was achieved in 86% of the patients while complications such as femoral or transtibial amputation, recurrence of infection or even death during inpatient treatment could be evidenced in six patients (14%). In patients who underwent multiple-stage surgery for five or more times, germ changes and repeated germ detection was more common than in patients with less surgeries. CONCLUSIONS Surgical treatment of infected nonunions poses a high burden on the patients with major complications occurring in about 14% of the patients using a multiple staged treatment concept. Future prospective studies comparing outcomes after limited with multiple staged revision surgeries are necessary.
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Affiliation(s)
- Markus Rupp
- Department of Trauma Surgery, University Medical Center Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Giessen and Marburg, Campus Giessen, Rudolf-Buchheim-Strasse 7, 35385, Giessen, Germany.
| | - Stefanie Kern
- Experimental Trauma Surgery, Justus-Liebig-University Giessen, Aulweg 128, 35392, Giessen, Germany
| | - Nike Walter
- Department of Trauma Surgery, University Medical Center Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Lydia Anastasopoulou
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Giessen and Marburg, Campus Giessen, Rudolf-Buchheim-Strasse 7, 35385, Giessen, Germany
| | - Reinhard Schnettler
- Faculty of Medicine, Justus-Liebig-University Giessen, Klinikstrasse 23, 35392, Giessen, Germany
| | - Christian Heiss
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Giessen and Marburg, Campus Giessen, Rudolf-Buchheim-Strasse 7, 35385, Giessen, Germany
- Experimental Trauma Surgery, Justus-Liebig-University Giessen, Aulweg 128, 35392, Giessen, Germany
| | - Volker Alt
- Department of Trauma Surgery, University Medical Center Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Giessen and Marburg, Campus Giessen, Rudolf-Buchheim-Strasse 7, 35385, Giessen, Germany
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Rupp M, Bärtl S, Lang S, Walter N, Alt V. [Fracture-related infections after intramedullary nailing : Diagnostics and treatment]. Unfallchirurg 2021; 125:50-58. [PMID: 34923596 DOI: 10.1007/s00113-021-01117-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2021] [Indexed: 11/29/2022]
Abstract
Intramedullary nailing is the treatment of choice for a large number of fractures requiring surgery. In cases of fracture-related infections (FRI) the treatment of nail infections requires special attention due to the closed situation of the osteosynthesis material in the intramedullary canal. This article gives an overview of the general principles and diagnostic criteria for FRI after nail fixation and discusses the treatment recommendations based on three case examples. In cases of acute implant infections, an implant-retaining procedure is principally possible for both periprosthetic joint infections and FRI; however, after intramedullary nailing the nail should also be exchanged in cases of acute nail infections as a sufficient debridement of the nail is impossible due to its intramedullary location. In chronic FRI after intramedullary nailing a one-stage or two-stage procedure can be followed. In cases of adequate soft tissue coverage, good fracture reduction and an expected bone healing without critical bony substance defects, a one-stage procedure with nail exchange should be preferred. If a chronic infection with soft tissue and bone defects develops after intramedullary nailing, a two-stage procedure analogous to the treatment of osteomyelitis should be considered. In this case a multidisciplinary team approach with specialists in plastic surgery, microbiology and infectious diseases is necessary. The use of local antibiotics and antimicrobial-coated implants is deemed to be advantageous.
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Affiliation(s)
- Markus Rupp
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg (UKR), Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - Susanne Bärtl
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg (UKR), Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - Siegmund Lang
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg (UKR), Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - Nike Walter
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg (UKR), Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland
| | - Volker Alt
- Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Regensburg (UKR), Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland.
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Letter in response to article in journal of infection: "The microbiology of chronic osteomyelitis: Changes over ten years". J Infect 2021; 83:709-737. [PMID: 34536422 DOI: 10.1016/j.jinf.2021.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 09/07/2021] [Indexed: 11/20/2022]
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14
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Rupp M, Baertl S, Walter N, Hitzenbichler F, Ehrenschwender M, Alt V. Is There a Difference in Microbiological Epidemiology and Effective Empiric Antimicrobial Therapy Comparing Fracture-Related Infection and Periprosthetic Joint Infection? A Retrospective Comparative Study. Antibiotics (Basel) 2021; 10:antibiotics10080921. [PMID: 34438971 PMCID: PMC8388716 DOI: 10.3390/antibiotics10080921] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/14/2021] [Accepted: 07/27/2021] [Indexed: 11/16/2022] Open
Abstract
This study aims to investigate (1) microbial patterns in fracture-related infections (FRIs) in comparison to microbiological patterns of periprosthetic joint infections (PJIs), (2) the identification of effective empiric antibiotic therapy for FRIs and PJIs and (3) analysis of difficult-to-treat (DTT) pathogens. Patients treated for FRIs or PJIs from 2017 to 2020 were evaluated for pathogens detected during treatment. Antibiotic susceptibility profiles were examined with respect to broadly used antibiotics and antibiotic combinations. Resistance rates to rifampicin or fluoroquinolone were determined. A total of 81 patients with PJI and 86 with FRI were included in the study. For FRIs Staphylococcus aureus was the most common infection-causing pathogen (37.4% vs. 27.9% for PJI). Overall, there was no statistical difference in pathogen distribution (p = 0.254). For FRIs, combinations of gentamicin + vancomycin (93.2%), co-amoxiclav + glycopeptide and meropenem + vancomycin (91.9% each) would have been effective for empiric therapy, similar to PJIs. Difficult to treat pathogens were more frequently detectable in PJIs (11.6% vs. 2.3%). Empiric therapy combinations such as gentamicin + vancomycin, co-amoxiclav + glycopeptide or meropenem + vancomycin, are effective antibiotic strategies for both FRI and PJI patients. More DTT pathogens were detectable in PJIs compared to FRIs.
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Affiliation(s)
- Markus Rupp
- Department for Trauma Surgery, University Medical Center Regensburg, 93053 Regensburg, Germany; (S.B.); (N.W.); (V.A.)
- Correspondence: ; Tel.: +49-941944-6799
| | - Susanne Baertl
- Department for Trauma Surgery, University Medical Center Regensburg, 93053 Regensburg, Germany; (S.B.); (N.W.); (V.A.)
| | - Nike Walter
- Department for Trauma Surgery, University Medical Center Regensburg, 93053 Regensburg, Germany; (S.B.); (N.W.); (V.A.)
| | - Florian Hitzenbichler
- Department of Infection Prevention and Infectious Diseases, University Medical Center Regensburg, 93053 Regensburg, Germany;
| | - Martin Ehrenschwender
- Institute of Clinical Microbiology and Hygiene, University Medical Center Regensburg, 93053 Regensburg, Germany;
| | - Volker Alt
- Department for Trauma Surgery, University Medical Center Regensburg, 93053 Regensburg, Germany; (S.B.); (N.W.); (V.A.)
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McNally M. Comment on "Bioactive glass S53P4 vs. autologous bone graft for filling defects in patients with chronic osteomyelitis and infected non-unions - a single center experience" by Steinhausen et al. (2021). J Bone Jt Infect 2021; 6:199-201. [PMID: 34123709 PMCID: PMC8188880 DOI: 10.5194/jbji-6-199-2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 05/04/2021] [Indexed: 12/22/2022] Open
Affiliation(s)
- Martin McNally
- Oxford Bone Infection Unit, Nuffield Orthopaedic Centre, Oxford University Hospitals, Oxford, UK
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