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Burns AWR, Smith P, Lynch J. Intra-articular Vancomycin Reduces Prosthetic Infection in Primary Hip and Knee Arthroplasty. Arthroplast Today 2024; 26:101333. [PMID: 38419970 PMCID: PMC10900868 DOI: 10.1016/j.artd.2024.101333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 11/16/2023] [Accepted: 01/27/2024] [Indexed: 03/02/2024] Open
Abstract
Background Intravenous antibiotic infusion has been the standard prophylaxis for total joint arthroplasty surgery. However, infection rates still occur at 1%-2% in many series. Single-dose intra-articular antibiotics (IAAs) present a safe and potentially more effective prophylactic regime in total joint arthroplasty. This study aimed to assess the outcomes of a single-dose IAA injection on PJI rates in a single surgeon series of hip and knee arthroplasty. Methods We reviewed the data of all patients operated on for a primary hip or knee replacement from 2010 to 2021. From January 2018, 1 gm of vancomycin in 10 ml of saline was injected into every total joint replacement after fascial closure. A comparison was made with PJI referencing the Australian National Joint Replacement Registry data on revision for the 2 periods: 2010-2017 and 2018-2021. Results During the period without IAA (2010-2017) for TKR, 6 of 489 (1.2%), and for THR, 5 of 694 (0.7%) had PJI requiring revision surgery. In the period with IAA (2018-2021) for TKR, 0 of 214 (0%, P = .11), and for THR, 1 of 517 (0.2%, P = .19) PJI required revision surgery, but the overall incidence of PJI for TKR and THR was significantly reduced (P = .03). Conclusions A single dose of intra-articular vancomycin 1 gm injected into the total joint replacement following fascial closure reduced the incidence of deep PJI requiring a revision surgery in a single-surgeon series. These results demonstrate significant benefits to this technique which merit further larger trials.
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Affiliation(s)
- Alexander W R Burns
- Trauma and Orthopaedic Research Unit, Department of Orthopaedic Surgery, The Canberra Hospital, Canberra, ACT, Australia
| | - Paul Smith
- Trauma and Orthopaedic Research Unit, Department of Orthopaedic Surgery, The Canberra Hospital, Canberra, ACT, Australia
| | - Joseph Lynch
- Trauma and Orthopaedic Research Unit, Department of Orthopaedic Surgery, The Canberra Hospital, Canberra, ACT, Australia
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Hall S, Grayson J, Grant G, Vertullo C, Anoopkumar-Dukie S. In Vitro Evaluation of Vancomycin-Induced Toxicity in Human Primary Knee Chondrocytes. Int J Toxicol 2024; 43:177-183. [PMID: 37989131 PMCID: PMC10916344 DOI: 10.1177/10915818231216413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Septic arthritis as a complication of orthopaedic joint surgery can have catastrophic outcomes for patients. To minimise infection risk associated with elective orthopaedics, topical vancomycin during surgery has become increasingly common. Evidence suggests that high concentrations of vancomycin, following direct application of the drug to the joint, are toxic towards various local cell types in the joint, including chondrocytes. However, the mechanism of this vancomycin tissue toxicity is yet to be determined. The aim of this study was to evaluate the toxicity of vancomycin on chondrocytes and the mechanisms of cell death involved. Human primary knee chondrocytes were exposed to vancomycin (1.25-10 mg/mL) for 24 h and their viability assessed using the resazurin reduction assay in vitro. Specific cell death mechanisms and their contributors, including reactive oxygen species (ROS) production and apoptosis, were measured. This study showed that high concentrations of vancomycin (5 and 10 mg/mL) were toxic towards human primary knee chondrocyte cells, while lower concentrations (1.25 and 2.5 mg/mL) were not. Cell death studies found that this occurred through an apoptotic pathway. This study provides additional support that vancomycin in high doses is toxic towards chondrocytes and preliminary evidence that this toxicity occurs via apoptotic cell death mechanisms.
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Affiliation(s)
- Susan Hall
- School of Pharmacy and Medical Sciences, Griffith University, Gold Coast, Australia
| | - Jane Grayson
- School of Health Sciences, The University of Sydney, Glebe, Australia
| | - Gary Grant
- School of Pharmacy and Medical Sciences, Griffith University, Gold Coast, Australia
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Hülskamp M, Stolberg-Stolberg J, Raschke M, Rosslenbroich S. [Importance of local antibiotics in the prophylaxis and treatment of fracture-associated infections]. UNFALLCHIRURGIE (HEIDELBERG, GERMANY) 2024; 127:89-95. [PMID: 38206351 DOI: 10.1007/s00113-023-01398-7] [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: 11/27/2023] [Indexed: 01/12/2024]
Abstract
BACKGROUND Fracture-associated infections (FRI) are a severe complication that lead to higher morbidity and high costs for the healthcare system. An effective prophylaxis and treatment of FRI are therefore of great interest. OBJECTIVE The aim of this review is to summarize the available evidence on the use of local antibiotics for the prophylaxis and treatment of FRI. MATERIAL AND METHODS A thorough search and a narrative synthesis of the available literature were performed. Their depiction is supplemented by an illustrative presentation of a case report. RESULTS A robust consensus definition of FRI has existed since 2018. The current use of local antibiotics for the prophylaxis and treatment of FRI in Germany is heterogeneous. There is no consensus on local antibiotic treatment of FRI. The available literature shows an advantage for the additive local antibiotic treatment of open fractures. In closed fractures there is a tendency towards an advantage especially in the presence of further risk factors (long duration of external fixation, higher degree of closed tissue damage, compartment syndrome). According to analogous data from the field of endoprosthetics, additive local antibiotic treatment could also be advantageous under closed soft tissue conditions. The evidence is insufficient to enable the recommendation for a specific antibiotic or a specific mode of application. Local and systemic adverse reactions are frequently discussed in the literature but their incidence is low. CONCLUSION Overall, additive local antibiotic treatment is to be recommended for open fractures and in closed fractures in the presence of other risk factors. Local and systemic adverse reactions as well as the development of antibiotic resistance must be weighed up in individual cases.
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Affiliation(s)
- Michael Hülskamp
- Klinik für Unfall‑, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude W1, 48149, Münster, Deutschland
| | - Josef Stolberg-Stolberg
- Klinik für Unfall‑, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude W1, 48149, Münster, Deutschland
| | - Michael Raschke
- Klinik für Unfall‑, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude W1, 48149, Münster, Deutschland
| | - Steffen Rosslenbroich
- Klinik für Unfall‑, Hand- und Wiederherstellungschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude W1, 48149, Münster, Deutschland.
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Hu X, Niemann M, Kienzle A, Braun K, Back DA, Gwinner C, Renz N, Stoeckle U, Trampuz A, Meller S. Evaluating ChatGPT responses to frequently asked patient questions regarding periprosthetic joint infection after total hip and knee arthroplasty. Digit Health 2024; 10:20552076241272620. [PMID: 39130521 PMCID: PMC11311159 DOI: 10.1177/20552076241272620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 07/09/2024] [Indexed: 08/13/2024] Open
Abstract
Background Patients access relevant information concerning their orthopaedic surgery resources through multiple information channels before presenting for clinical treatment. Recently, artificial intelligence (AI)-powered chatbots have become another source of information for patients. The currently developed AI chat technology ChatGPT (OpenAI LP) is an application for such purposes and it has been rapidly gaining popularity, including for patient education. This study sought to evaluate whether ChatGPT can correctly answer frequently asked questions (FAQ) regarding periprosthetic joint infection (PJI). Methods Twelve FAQs about PJI after hip and knee arthroplasty were identified from the websites of fifteen international clinical expert centres. ChatGPT was confronted with these questions and its responses were analysed for their accuracy using an evidence-based approach by a multidisciplinary team. Responses were categorised in four groups: (1) Excellent response that did not require additional improvement; (2) Satisfactory responses that required a small amount of improvement; (3) Satisfactory responses that required moderate improvement; and (4) Unsatisfactory responses that required a large amount of improvement. Results From the analysis of the responses given by the chatbot, no reply received an 'unsatisfactory' rating; one did not require any correction; and the majority of the responses required low (7 out of 12) or moderate (4 out of 12) clarification. Although a few responses required minimal clarification, the chatbot responses were generally unbiased and evidence-based, even when asked controversial questions. Conclusions The AI-chatbot ChatGPT was able to effectively answer the FAQs of patients seeking information around PJI diagnosis and treatment. The given information was also written in a manner that can be assumed to be understandable by patients. The chatbot could be a valuable clinical tool for patient education and understanding around PJI treatment in the future. Further studies should evaluate its use and acceptance by patients with PJI.
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Affiliation(s)
- Xiaojun Hu
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Department of Orthopedics, Seventh People's Hospital of Chongqing, Chongqing, China
| | - Marcel Niemann
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Arne Kienzle
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Karl Braun
- Department of Trauma Surgery, University Hospital Rechts der Isar, Technical University of Munich, Munich, Germany
| | - David Alexander Back
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Clemens Gwinner
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Nora Renz
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Ulrich Stoeckle
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Andrej Trampuz
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Sebastian Meller
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
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Burns AWR, Chao T, Tsai N, Lynch JT, Smith PN. The use of intra-articular vancomycin is safe in primary hip and knee arthroplasty. J Orthop 2023; 46:161-163. [PMID: 37997601 PMCID: PMC10663633 DOI: 10.1016/j.jor.2023.10.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 10/22/2023] [Indexed: 11/25/2023] Open
Abstract
Background The use of a single dose of intra-articular antibiotic (IAA) has been reported in reducing the rate of prosthetic joint injection after total hip and knee arthroplasty. We examine the safety of IAA in primary hip and knee replacement surgery and the blood levels and joint fluid levels of vancomycin utilising this technique. Methods From August to October 2021, 68 patients undergoing primary total joint arthroplasty (THA & TKA) were given 1g vancomycin intra-articularly (IA)after closure of the fascia. All patients received 2g cefazolin intravenously (IV) 30 min prior to the procedure as is our standard prophylaxis, and 21 of the patients (IA + IV) were also administered an additional 1 gm vancomycin IV. Post-operative blood vancomycin, creatinine land eGFR level monitoring was performed d1 and d3. To determine the post-operative intra-articular vancomycin levels, surgical drain fluid was sampled at day 1 and 2, in 10 patients. Results All patients had serum vancomycin levels measured on day 1 and 3. In the group where vancomycin was injected after fascial closure, the average blood vancomycin level day 1 was 5.2 μg/ml (range 2.0-10.9) and day 3 was <1.4 μg/ml. The average pre-op creatinine levels were 69.4 μmol/L (56.1-82.6) compared to 70.2 μmol/L (57.0-83.4) on day 1 and 66.1 μmol/L (52.6-79.6) on day 3, (p = 0.663). The average pre-op eGFR levels (ml/min/1.73 m2) were 82.2 (76.0-88.3) compared to 81.7 (75.6-87.8) on day 1 and 83.0 (76.8-89.2) on day 3 (p = 0.736). Samples of joint fluid aspirated from surgical drains on day 1 and day 2 showed average vancomycin levels of 224 μg/ml and 51 μg/ml respectively, significantly higher than the MIC for Staph aureus. Conclusions The use of intra-articular vancomycin is safe in primary TJA, with no renal damage and delivers levels within the joint which are highly therapeutic for at least 48 h post injection.
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Affiliation(s)
- Alexander W R Burns
- Trauma and Orthopaedic Research Unit, The Canberra Hospital and Australian National University, Canberra, ACT, Australia
| | - Tat Chao
- Trauma and Orthopaedic Research Unit, The Canberra Hospital and Australian National University, Canberra, ACT, Australia
| | - Nicholas Tsai
- Trauma and Orthopaedic Research Unit, The Canberra Hospital and Australian National University, Canberra, ACT, Australia
| | - Joseph T Lynch
- Trauma and Orthopaedic Research Unit, The Canberra Hospital and Australian National University, Canberra, ACT, Australia
| | - Paul N Smith
- Trauma and Orthopaedic Research Unit, The Canberra Hospital and Australian National University, Canberra, ACT, Australia
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Hu M, Zhang Y, Yang X, Wang Y, Xu H, Xiang S. Intraarticular vancomycin decreased the risk of acute postoperative periprosthetic joint infection without increasing complication in primary total joint arthroplasty-a prospective study. Int J Infect Dis 2023; 136:64-69. [PMID: 37714404 DOI: 10.1016/j.ijid.2023.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/03/2023] [Accepted: 09/09/2023] [Indexed: 09/17/2023] Open
Abstract
OBJECTIVES To investigate the preventive effect of intraarticularly administered vancomycin on acute postoperative periprosthetic joint infection (PJI) in total joint arthroplasty (TJA). METHODS Consecutive patients who underwent unilateral primary TJA were prospectively enrolled. The patients were divided into vancomycin group and control group according to whether 1 g of vancomycin powder suspended in 30 ml normal saline was intraarticularly administered after arthrotomy closure. Acute postoperative PJI and aseptic wound complication were evaluated within 3 months postoperatively. Vancomycin-associated toxicity including acute renal failure, ototoxicity and anaphylaxis was also evaluated. RESULTS In terms of demographic parameters and comorbidities, no significant difference was found between the two groups. Intra-articular vancomycin significantly lowered the risk of acute postoperative PJI after primary TJA (P = 0.015) and primary total knee arthroplasty (P = 0.031). However, for patients who underwent total hip arthroplasty, the PJI rate was comparable between the two groups. Overall, the risk of aseptic wound complication between the two groups was also similar. Vancomycin-associated acute renal injury, ototoxicity, or anaphylaxis was not observed. CONCLUSIONS Intra-articular injection of 1 g of vancomycin suspension after arthrotomy closure during TJA lowered the risk of acute postoperative PJI without increasing the risk of aseptic wound complication and vancomycin-associated systemic toxicity.
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Affiliation(s)
- Mingwei Hu
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yifan Zhang
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xue Yang
- Department of Operation Room, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Yingzhen Wang
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Hao Xu
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Shuai Xiang
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China.
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Gramlich Y, Schnetz M, Hoffmann R. Local Administration of Antibiotics in Orthopedics and Traumatology. ZEITSCHRIFT FUR ORTHOPADIE UND UNFALLCHIRURGIE 2023; 161:563-583. [PMID: 37769688 DOI: 10.1055/a-1989-0565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
2022 marks the 50th anniversary of the development of the antibiotic loaded PMMA chain. The loading of bone cements with antibiotics was a major advance in the treatment of musculoskeletal infections and is still a proven standard today. The research and use of novel antibiotic carriers continues to be an important part of research in the context of musculoskeletal infections. The article provides an overview of the various local antibiotics available and their specifics. In addition, current adapted treatment concepts are discussed.
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Otero JE, Brown TS, Courtney PM, Kamath AF, Nandi S, Fehring KA. What's New in Musculoskeletal Infection. J Bone Joint Surg Am 2022; 104:1228-1235. [PMID: 35700085 DOI: 10.2106/jbjs.22.00183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Jesse E Otero
- OrthoCarolina Hip and Knee Center, Atrium Health Musculoskeletal Institute, Charlotte, North Carolina
| | - Timothy S Brown
- Department of Orthopedics and Sports, Houston Methodist Hospital, Houston, Texas
| | | | - Atul F Kamath
- Orthopaedic & Rheumatologic Institute, Cleveland Clinic, Cleveland, Ohio
| | - Sumon Nandi
- University of Maryland School of Medicine, Baltimore, Maryland
| | - Keith A Fehring
- OrthoCarolina Hip and Knee Center, Atrium Health Musculoskeletal Institute, Charlotte, North Carolina
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Systematic Review and Meta-Analysis of Intrawound Vancomycin in Total Hip and Total Knee Arthroplasty: A Continued Call for a Prospective Randomized Trial. J Arthroplasty 2022; 37:1405-1415.e1. [PMID: 35314283 DOI: 10.1016/j.arth.2022.03.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/12/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Periprosthetic joint injection (PJI) is a rare, but life-altering complication of total joint arthroplasty (TJA). Though intrawound vancomycin powder (IVP) has been studied in other orthopedic subspecialties, its efficacy and safety in TJA has not been established. METHODS PubMed and MEDLINE databases were used to identify studies utilizing IVP in primary and revision total hip (THA) and knee arthroplasty (TKA). Postoperative PJI data were pooled using random effect models with results reported as odds ratios (ORs) and 95% confidence intervals (CIs). Studies were weighted by the inverse variance of their effect estimates. RESULTS Overall, 16 of the 1871 studies identified were pooled for final analysis, yielding 33,731 patients totally. Of these, 17 164 received IVP. In aggregate, patients who received IVP had a decreased rate of PJI (OR 0.46, P < .05). Separately, TKA and THA patients who received IVP had lower rates of PJI (OR 0.41, P < .05 and OR 0.45, P < .05, respectively). Aggregate analysis of primary TKA and THA patients also revealed a decreased PJI rate (OR 0.44, P < .05). Pooled revision TKA and THA patients had a similar decrease in PJI rates (OR 0.30, P < .05). Although no publication bias was appreciated, these findings are limited by the low-quality evidence available. CONCLUSION While IVP may reduce the risk of PJI in primary and revision TJA, its widespread use cannot be recommended until higher-quality data, such as that obtained from randomized control trials, are available. This study underscores the continued need for more rigorous studies before general adoption of this practice by arthroplasty surgeons.
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Hamad C, Chowdhry M, Sindeldecker D, Bernthal NM, Stoodley P, McPherson EJ. Adaptive antimicrobial resistance, a description of microbial variants, and their relevance to periprosthetic joint infection. Bone Joint J 2022; 104-B:575-580. [PMID: 35491584 PMCID: PMC9948434 DOI: 10.1302/0301-620x.104b5.bjj-2021-1759.r1] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Periprosthetic joint infection (PJI) is a difficult complication requiring a comprehensive eradication protocol. Cure rates have essentially stalled in the last two decades, using methods of antimicrobial cement joint spacers and parenteral antimicrobial agents. Functional spacers with higher-dose antimicrobial-loaded cement and antimicrobial-loaded calcium sulphate beads have emphasized local antimicrobial delivery on the premise that high-dose local antimicrobial delivery will enhance eradication. However, with increasing antimicrobial pressures, microbiota have responded with adaptive mechanisms beyond traditional antimicrobial resistance genes. In this review we describe adaptive resistance mechanisms that are relevant to the treatment of PJI. Some mechanisms are well known, but others are new. The objective of this review is to inform clinicians of the known adaptive resistance mechanisms of microbes relevant to PJI. We also discuss the implications of these adaptive mechanisms in the future treatment of PJI. Cite this article: Bone Joint J 2022;104-B(5):575-580.
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Affiliation(s)
- Christopher Hamad
- Department of Orthopaedic Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Madhav Chowdhry
- Nuffield Department of Primary Care Health Sciences, Kellogg College, University of Oxford, Oxford, UK
| | - Devin Sindeldecker
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, USA,Biomedical Sciences Graduate Program, The Ohio State University, Columbus, Ohio, USA
| | - Nicholas M. Bernthal
- Department of Orthopaedic Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Paul Stoodley
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, USA,Department of Orthopaedics, The Ohio State University, Columbus, Ohio, USA,National Centre for Advanced Tribology at Southampton, Department of Mechanical Engineering, University of Southampton, Southampton, UK
| | - Edward J. McPherson
- Department of Orthopaedic Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA,Correspondence should be sent to Edward J. McPherson. E-mail:
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