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Davis KP, McDermott LA, Snydman DR, Aldridge BB. In vitro identification of underutilized β-lactam combinations against methicillin-resistant Staphylococcus aureus bacteremia isolates. Microbiol Spectr 2024; 12:e0097624. [PMID: 38916355 PMCID: PMC11302340 DOI: 10.1128/spectrum.00976-24] [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: 04/17/2024] [Accepted: 05/24/2024] [Indexed: 06/26/2024] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) bacteremia is a serious clinical challenge with high mortality rates. Antibiotic combination therapy is currently used in cases of persistent infection; however, the limited development of new antibiotics will likely increase the need for combination therapy, and better methods are needed for identifying effective combinations for treating persistent bacteremia. To identify pairwise combinations with the most consistent potential for benefit compared to monotherapy with a primary anti-MRSA agent, we conducted a systematic study with an in vitro high-throughput methodology. We tested daptomycin and vancomycin each in combination with gentamicin, rifampicin, cefazolin, and oxacillin, and ceftaroline with daptomycin, gentamicin, and rifampicin. Combining cefazolin with daptomycin lowered the daptomycin concentration required to reach 95% growth inhibition (IC95) for all isolates tested and lowered daptomycin IC95 below the sensitivity breakpoint for five out of six isolates that had daptomycin minimum inhibitory concentrations at or above the sensitivity breakpoint. Similarly, vancomycin IC95s were decreased when vancomycin was combined with cefazolin for 86.7% of the isolates tested. This was a higher percentage than was achieved by adding any other secondary antibiotic to vancomycin. Adding rifampicin to daptomycin or vancomycin did not always reduce IC95s and failed to produce synergistic interaction in any of the isolates tested; the addition of rifampicin to ceftaroline was frequently synergistic and always lowered the amount of ceftaroline required to reach the IC95. These analyses rationalize further in vivo evaluation of three drug pairs for MRSA bacteremia: daptomycin+cefazolin, vancomycin+cefazolin, and ceftaroline+rifampicin.IMPORTANCEBloodstream infections caused by methicillin-resistant Staphylococcus aureus (MRSA) have a high mortality rate despite the availability of vancomycin, daptomycin, and newer antibiotics including ceftaroline. With the slow output of the antibiotic pipeline and the serious clinical challenge posed by persistent MRSA infections, better strategies for utilizing combination therapy are becoming increasingly necessary. We demonstrated the value of a systematic high-throughput approach, adapted from prior work testing antibiotic combinations against tuberculosis and other mycobacteria, by using this approach to test antibiotic pairs against a panel of MRSA isolates with diverse patterns of antibiotic susceptibility. We identified three antibiotic pairs-daptomycin+cefazolin, vancomycin+cefazolin, and ceftaroline+rifampicin-where the addition of the second antibiotic improved the potency of the first antibiotic across all or most isolates tested. Our results indicate that these pairs warrant further evaluation in the clinical setting.
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Affiliation(s)
- Kathleen P. Davis
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts, USA
- The Stuart B. Levy Center for Integrated Management of Antimicrobial Resistance, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Laura A. McDermott
- Division of Geographic Medicine and Infectious Diseases, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, USA
| | - David R. Snydman
- The Stuart B. Levy Center for Integrated Management of Antimicrobial Resistance, Tufts University School of Medicine, Boston, Massachusetts, USA
- Division of Geographic Medicine and Infectious Diseases, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, USA
| | - Bree B. Aldridge
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts, USA
- The Stuart B. Levy Center for Integrated Management of Antimicrobial Resistance, Tufts University School of Medicine, Boston, Massachusetts, USA
- Department of Biomedical Engineering, Tufts University School of Engineering, Medford, Massachusetts, USA
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Lam PW, Leis JA, Daneman N. Antibiotic-Induced Neutropenia in Patients Receiving Outpatient Parenteral Antibiotic Therapy: a Retrospective Cohort Study. Antimicrob Agents Chemother 2023; 67:e0159622. [PMID: 36853004 PMCID: PMC10019188 DOI: 10.1128/aac.01596-22] [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: 11/28/2022] [Accepted: 02/14/2023] [Indexed: 03/01/2023] Open
Abstract
Our research objective was to describe the incidence and management of antibiotic-induced neutropenia in patients receiving outpatient parenteral antibiotic therapy (OPAT) at our institution over a 7-year period. We conducted a retrospective cohort study of patients followed by the OPAT clinic from 1 July 2016 to 30 March 2022 who developed antibiotic-induced neutropenia (defined as an absolute neutrophil count of ≤1.5 × 109/L). Patients receiving vancomycin in the OPAT clinic received weekly laboratory monitoring, while those receiving other antibiotics received laboratory monitoring at week 3 of therapy. Out of the 2,513 treatment courses, 55 cases of antibiotic-induced neutropenia were identified, resulting in an incidence of 2.2 cases per 100 treatment courses (95% confidence interval [CI], 1.7 to 2.9). Of the 45 cases for which a sole cause was identified, the three most common intravenous antibiotic culprits were vancomycin (21/541; 3.9%), ceftriaxone (10/490; 2.0%), and cloxacillin (2/103; 1.9%). Five (9.1%) patients had symptoms accompanying neutropenia that warranted hospital admission. There were no deaths, and all patients recovered their neutrophil count after antibiotic discontinuation or completion. In nine cases (16.3%), the culprit beta-lactam antibiotic was changed to another beta-lactam agent containing a structurally different side chain, with successful recovery of the neutrophil count in 9/9 (100%). The highest risk of antibiotic-induced neutropenia was associated with vancomycin, ceftriaxone, and cloxacillin in our cohort. With standardized outpatient monitoring during the third week of OPAT, cases of neutropenia can be detected early and managed without hospitalization. Data from our study also support the safety of switching to alternate beta-lactams with structurally different side chains.
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Affiliation(s)
- Philip W. Lam
- Division of Infectious Diseases, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Centre for Quality Improvement and Patient Safety, University of Toronto, Toronto, Ontario, Canada
| | - Jerome A. Leis
- Division of Infectious Diseases, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
- Centre for Quality Improvement and Patient Safety, University of Toronto, Toronto, Ontario, Canada
| | - Nick Daneman
- Division of Infectious Diseases, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
- Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
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3
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Tan EK, Ahmad Hanif KA, Jebasingam Issace SJ, Che-Hamzah F. A Rare Occurrence of Opportunistic Infection by Streptococcus mitis Due to Antibiotic-Induced Neutropenia in Prosthetic Joint Infection. Cureus 2023; 15:e35583. [PMID: 37007355 PMCID: PMC10062401 DOI: 10.7759/cureus.35583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Prosthetic joint infection (PJI) is a devastating complication in arthroplasty surgery. Although the prevalence is less than 2%, its functional and financial implications are significant. Part of its treatment involves the usage of prolonged and high-dose systemic antibiotics. Ironically, this predisposes the patient to unwanted adverse effects caused by the drugs. We report a case of cefazolin-induced neutropenia that led to Streptococcus mitis (S. mitis) bacteraemia in a patient with Staphylococcus aureus PJI. There have been no previous reports on cefazolin-induced neutropenic bacteraemia complicating the treatment of PJI. This case report aims to create awareness among the attending physicians on the possibility of cefazolin-induced neutropenia, which led to bacteraemia from an opportunistic microorganism. The reversal was as simple as cessation of the antibiotic itself. However, if not recognized, it could be fatal.
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Cimino C, Allos BM, Phillips EJ. A Review of β-Lactam-Associated Neutropenia and Implications for Cross-reactivity. Ann Pharmacother 2020; 55:1037-1049. [PMID: 33215507 DOI: 10.1177/1060028020975646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE To review the incidence, management, and current understanding of the pathophysiology of β-lactam-induced neutropenia and to critically evaluate the practicality and safety of direct substitution to an alternative β-lactam in the setting of this reaction. DATA SOURCES A literature analysis using the PubMed and Ovid search engines (July 1968 to October 2020) was performed using the search terms neutropenia, leukopenia, β-lactam, nonchemotherapy, agranulocytosis, and G-CSF (granulocyte colony-stimulating factor). STUDY SELECTION AND DATA EXTRACTION The included English-language studies evaluated the incidence, mechanism, and/or management of β-lactam-induced neutropenia in pediatric or adult patients. DATA SYNTHESIS Drug-induced neutropenia is a well-documented adverse reaction of β-lactam antibiotics, with an incidence of approximately 10% following at least 2 weeks of intravenous therapy. However, multiple gaps in knowledge remain in the mechanism of pathophysiology and optimal management of this reaction. Both direct toxic and immune-mediated mechanisms have been implicated. Although the cornerstone of management includes cessation of the offending agent, controversy exists on the appropriateness of direct substitution or future use of an alternative β-lactam. RELEVANCE TO PATIENT CARE AND CLINICAL PRACTICE Given the frequency of use and superiority of β-lactams over alternative therapy for several infectious disease states, practical recommendations are needed on the management and safe use of β-lactams following β-lactam-induced neutropenia. CONCLUSION Future use of β-lactams with differing R1 side chains, particularly those from a separate class, should not be deemed contraindicated following β-lactam-induced neutropenia and may be considered when indicated, with close laboratory monitoring.
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Affiliation(s)
- Christo Cimino
- Vanderbilt University Medical Center, Nashville, TN, USA
| | - Ban M Allos
- Vanderbilt University Medical Center, Nashville, TN, USA
| | - Elizabeth J Phillips
- Vanderbilt University Medical Center, Nashville, TN, USA.,Murdoch University, Murdoch, WA, Australia
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Scoble PJ, Reilly J, Tillotson GS. Real-World Use of Oritavancin for the Treatment of Osteomyelitis. Drugs Real World Outcomes 2020; 7:46-54. [PMID: 32588387 PMCID: PMC7334326 DOI: 10.1007/s40801-020-00194-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Osteomyelitis is a difficult-to-treat disease that can require both surgical debridement and a prolonged course of antimicrobial therapy. Current standard of care for the antimicrobial treatment of osteomyelitis is fraught with multiple challenges and limitations. Patients typically require the insertion of an indwelling catheter for single or multiple daily intravenous antibiotic infusions for up to 6 weeks. Currently, there are treatment guidelines for only vertebral osteomyelitis, indicating the complexity of the condition. Oritavancin is a long-acting, second-generation lipoglycopeptide, administered intravenously once per week, which has potential to be a useful alternative in the treatment of osteomyelitis. This article reviews occurrence and outcomes of off-label oritavancin use for treatment of osteomyelitis as described in case reports. Analysis included 23 patients treated for osteomyelitis with single- or multiple-dose oritavancin. Overall, clinical cure or improvement was achieved in 87% of patients, and adverse events were mild and reported in only two patients. Clinical efficacy was demonstrated in 81.8% of methicillin-resistant Staphylococcus aureus (MRSA), 71.4% of methicillin-sensitive S. aureus (MSSA), 50% of vancomycin-resistant Enterococcus (VRE), and in the single case of Streptococcus pyogenes. Oritavancin has shown efficacy against Gram-positive pathogens in osteomyelitis, and offers a possible outpatient treatment option for osteomyelitis patients. Future studies are needed to determine dosing frequency in osteomyelitis patients.
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Affiliation(s)
| | - Joseph Reilly
- Atlanticare Regional Medical Center, Pomona, NJ, USA
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Veve MP, Stuart M, Davis SL. Comparison of Neutropenia Associated with Ceftaroline or Ceftriaxone in Patients Receiving at Least 7 Days of Therapy for Severe Infections. Pharmacotherapy 2019; 39:809-815. [PMID: 31257604 DOI: 10.1002/phar.2301] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
STUDY OBJECTIVE Ceftarolinefosamil is a cephalosporin with broad clinical utility; however, limited data suggest that prolonged ceftaroline exposure may be associated with neutropenia. The objective was to determine drug and patient factors associated with neutropenia in patients receiving ceftaroline or ceftriaxone for deep-seated infections. DESIGN Retrospective, ratio-matched cohort study. SETTING Four acute-care hospitals within an urban health care system. PATIENTS A total of 176 hospitalized adults who received definitive ceftaroline (44 patients) or ceftriaxone (132 patients) therapy for at least 7 days between January 2013 and April 2017 for any of the following indications: bone and joint infections (BJI), infective endocarditis (IE), or bloodstream infections (BSI). MEASUREMENTS AND MAIN RESULTS The primary outcome was development of neutropenia while receiving cephalosporin therapy, defined as an absolute neutrophil count (ANC) <1500 cells/mm3 . Neutropenia severity and patient characteristics were described and compared between the ceftaroline and ceftriaxone groups. The median (interquartile range [IQR]) antibiotic prescription duration was 41 (29-44) days for the ceftaroline group and 40 (28-44) days for the ceftriaxone group (p=0.9). Cephalosporin indications were 112 (64%) BJI, 27 (15%) BSI, 16 (9%) IE, and 21 (12%) multiple infections; ceftaroline was more commonly used in BJI (p=0.03), and ceftriaxone was more commonly used in IE (p=0.01). Neutropenia developed in 16 (9%) patients: 8 (18%) in the ceftaroline group and 8 (6%) in the ceftriaxone group (p=0.03). Median (IQR) onset to neutropenia was 22 (15-28) days, and median (IQR) change in ANC was 2.86 (1.50-4.08) cells/mm3 ; most cases of neutropenia were mild (12 patients [75%]). The median (IQR) time to mild or moderate-severe neutropenia was not significantly different (p=0.68): 22 (14-28) and 22 (21-36) days, respectively. Treatment was discontinued in 4 (25%) patients due to neutropenia. Ceftaroline use was independently associated with neutropenia (adjusted odds ratio 3.2, 95% confidence interval 1.2-10.5) after adjusting for lower body mass index strata (18.5-25 kg/m2 ). CONCLUSION Prolonged ceftaroline use was an independent risk factor for developing mild neutropenia. Clinicians should be cognizant of ANC monitoring in scenarios where prolonged ceftaroline courses are prescribed.
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Affiliation(s)
- Michael P Veve
- Department of Pharmacy Practice, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan
- Department of Pharmacy Services, Henry Ford Hospital, Detroit, Michigan
| | - Misa Stuart
- Department of Pharmacy Practice, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan
| | - Susan L Davis
- Department of Pharmacy Practice, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan
- Department of Pharmacy Services, Henry Ford Hospital, Detroit, Michigan
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Jansen JW, Linneman TW, Tan X, Moenster RP. Comparison of Adverse Drug Reactions Between Patients Treated With Ceftaroline or Ceftriaxone: A Single-Center, Matched Cohort Study. Open Forum Infect Dis 2019; 6:ofz279. [DOI: 10.1093/ofid/ofz279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 06/11/2019] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Little information is available on the relative tolerability of ceftaroline versus other cephalosporins in clinical practice. We sought to compare adverse drug reactions (ADRs) associated with ceftaroline with those associated with ceftriaxone in hospitalized patients.
Materials and Methods
This was a retrospective, single-center matched cohort (according to age, indication, and duration) study of patients treated with ceftaroline or ceftriaxone at the VA St Louis Health Care System between 29 October 2010 and 28 March 2017, to compare rates of ADRs between the agents. Patients included received ≥2 doses of either medication to treat osteomyelitis, acute bacterial skin and skin structure infection, blood stream infection, pneumonia, infective endocarditis, septic arthritis, prosthetic joint infection, or empyema. The primary and secondary outcomes were the composite of any ADR during therapy and any ADR leading to premature discontinuation of therapy. The ADRs evaluated included rash, neutropenia, acute kidney injury, eosinophilia, thrombocytopenia, transaminitis, and hyperbilirubinemia.
Results
After matching, 50 patients per group were included and analyzed. An ADR occurred in 20% (10 of 50) of patients treated with ceftriaxone and 16% (8 of 50) of those treated with ceftaroline (P = .60). Two percent (1 of 50) of those treated with ceftriaxone and 16% (8 of 50) treated with ceftaroline had therapy discontinued owing to an ADR (P = .03). The most common ADR was eosinophilia (3 of 50) in the ceftriaxone group and rash (5 of 50) in the ceftaroline group. Ceftaroline therapy was identified as an independent risk factor for an ADR requiring premature discontinuation (odds ratio, 10.2; 95% confidence interval, 1.19–87.8; P = .03).
Conclusions
Although there was no difference in the rates of ADRs between patients in the ceftriaxone and ceftaroline groups, significantly more ceftaroline-treated patients required premature discontinuation.
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Affiliation(s)
- Jeffrey W Jansen
- Pharmacy Department, SCL Health Saint Vincent Healthcare, Billings, Montana
| | - Travis W Linneman
- Pharmacy Service, VA St Louis Health Care System, Missouri
- Department of Pharmacy Practice, St Louis College of Pharmacy, Missouri
| | - Xing Tan
- College of Pharmacy, University of Illinois at Chicago
| | - Ryan P Moenster
- Pharmacy Service, VA St Louis Health Care System, Missouri
- Department of Pharmacy Practice, St Louis College of Pharmacy, Missouri
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8
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Sullivan EL, Turner RB, O'Neal HR, Crum-Cianflone NF. Ceftaroline-Associated Neutropenia: Case Series and Literature Review of Incidence, Risk Factors, and Outcomes. Open Forum Infect Dis 2019; 6:ofz168. [PMID: 31123688 PMCID: PMC6524829 DOI: 10.1093/ofid/ofz168] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 03/27/2019] [Indexed: 01/22/2023] Open
Abstract
Ceftaroline is increasingly prescribed for "off-label" indications involving longer durations and higher doses. There have been postmarketing case reports of neutropenia among patients who have received extended durations of ceftaroline, but limited published data currently exist on its incidence and risk factors. We review a total of 37 published cases of ceftaroline-associated neutropenia including cases (n = 4) identified in our health care system. The median time from ceftaroline initiation to development of neutropenia (range) was 25 (8-125) days, with a median duration of neutropenia (range) of 4 (1-16) days. Agranulocytosis (absolute neutrophil count [ANC] nadir < 100 cells/mm3) developed in 49% of cases (n = 18), and there was an ANC nadir of 0 in 27% (n = 10). The overall incidence of neutropenia among cases receiving ceftaroline for ≥7-14 days (range) was 12% (7%-18% per individual study), higher than for comparator antibiotics in the literature. Risk factors for ceftaroline-associated neutropenia varied among studies and remain poorly defined.
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Affiliation(s)
- Eva L Sullivan
- Pharmacy Department, Scripps Mercy Hospital, San Diego, California
| | - R Brigg Turner
- School of Pharmacy, Pacific University, Hillsboro, Oregon
| | - Hollis R O'Neal
- Pulmonary & Critical Care Medicine, Louisiana State University Health/Our Lady of the Lake Regional Medical Center, Baton Rouge, Louisiana
| | - Nancy F Crum-Cianflone
- Internal Medicine Department, Scripps Mercy Hospital, San Diego, California.,Infectious Disease Division, Scripps Mercy Hospital, San Diego, California
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Chastain DB, Davis A. Treatment of chronic osteomyelitis with multidose oritavancin: A case series and literature review. Int J Antimicrob Agents 2018; 53:429-434. [PMID: 30537532 DOI: 10.1016/j.ijantimicag.2018.11.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 11/19/2018] [Accepted: 11/24/2018] [Indexed: 01/28/2023]
Abstract
Osteomyelitis remains difficult to treat, typically requiring a prolonged course of intravenous (i.v.) antibiotics. The optimal route and duration of antibiotics remains ill-defined due to limited prospective clinical trials. Oritavancin is a long-acting, semisynthetic lipoglycopeptide antibiotic with rapid concentration-dependent bactericidal activity against many Gram-positive organisms. Favourable pharmacokinetics makes oritavancin an appealing alternative to currently available antibiotics requiring daily infusion to decrease the risk of vascular access complications associated with outpatient antimicrobial therapy. The purpose of this study was to report the outcomes of nine patients with chronic osteomyelitis receiving multidose oritavancin. Using electronic medical records, patients aged ≥18 years treated with i.v. oritavancin between September 2015 and April 2018 at Downtown Dublin Wound Center, a hospital-owned outpatient wound care clinic and infusion centre affiliated with Meadows Regional Health System in Dublin, GA, were identified. Of 12 cases reviewed, 9 patients received at least two doses of i.v. oritavancin for the treatment of chronic osteomyelitis. All nine patients experienced clinical cure at 6-month follow-up after the last dose of oritavancin. Multidose oritavancin was found to be a safe and efficacious option for chronic osteomyelitis when treatment options are limited by patient complexities or barriers in their ability to access healthcare services.
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Affiliation(s)
- Daniel B Chastain
- University of Georgia College of Pharmacy, 1000 Jefferson Street, Albany, GA 31701, USA.
| | - Anthony Davis
- Downtown Dublin Wound Center, Meadows Regional Medical Center, Dublin, GA 31021, USA
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Vardakas KZ, Kalimeris GD, Triarides NA, Falagas ME. An update on adverse drug reactions related to β-lactam antibiotics. Expert Opin Drug Saf 2018; 17:499-508. [DOI: 10.1080/14740338.2018.1462334] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Konstantinos Z. Vardakas
- Alfa Institute of Biomedical Sciences, Athens, Greece
- Department of Medicine, Henry Dunant Hospital Center, Athens, Greece
| | - Georgios D. Kalimeris
- Alfa Institute of Biomedical Sciences, Athens, Greece
- Department of Medicine, Henry Dunant Hospital Center, Athens, Greece
| | - Nikolaos A. Triarides
- Alfa Institute of Biomedical Sciences, Athens, Greece
- Department of Medicine, Henry Dunant Hospital Center, Athens, Greece
| | - Matthew E. Falagas
- Alfa Institute of Biomedical Sciences, Athens, Greece
- Department of Medicine, Henry Dunant Hospital Center, Athens, Greece
- Department of Medicine, Tufts University School of Medicine, Boston, Massachusetts, USA
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