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Fosfomycin
Matthew E Falagas1, Evridiki K Vouloumanou2, George Samonis3
1Alfa Institute of Biomedical Sciences, Athens, Greece Department of Internal Medicine-Infectious Diseases, Iaso General Hospital, Iaso Group, Athens, Greece Department of Medicine, Tufts University School of Medicine, Boston, Massachusetts, USA m.falagas@aibs.gr.
Abstract:
The treatment of bacterial infections suffers from two major problems: spread of multidrug-resistant (MDR) or extensively drug-resistant (XDR) pathogens and lack of development of new antibiotics active against such MDR and XDR bacteria. As a result, physicians have turned to older antibiotics, such as polymyxins, tetracyclines, and aminoglycosides. Lately, due to development of resistance to these agents, fosfomycin has gained attention, as it has remained active against both Gram-positive and Gram-negative MDR and XDR bacteria. New data of higher quality have become available, and several issues were clarified further. In this review, we summarize the available fosfomycin data regarding pharmacokinetic and pharmacodynamic properties, the in vitro activity against susceptible and antibiotic-resistant bacteria, mechanisms of resistance and development of resistance during treatment, synergy and antagonism with other antibiotics, clinical effectiveness, and adverse events. Issues that need to be studied further are also discussed.
Insights
Fosfomycin shows sustained activity against multidrug-resistant (MDR) and extensively drug-resistant (XDR) bacteria, offering a viable option when other antibiotics fail. This review details its properties, effectiveness, and resistance mechanisms for treating challenging infections.
Area of Science:
- Microbiology
- Infectious Diseases
- Pharmacology
Background:
- The rise of multidrug-resistant (MDR) and extensively drug-resistant (XDR) bacterial pathogens presents a critical global health challenge.
- Limited development of novel antibiotics necessitates the re-evaluation and optimized use of existing agents, including older drugs like fosfomycin.
Purpose of the Study:
- To provide a comprehensive review of fosfomycin's current data, focusing on its utility against resistant bacteria.
- To analyze fosfomycin's pharmacokinetic/pharmacodynamic properties, in vitro activity, resistance mechanisms, clinical efficacy, and safety profile.
Main Methods:
- Systematic review of recent high-quality data on fosfomycin.
- Analysis of in vitro susceptibility testing against susceptible and resistant bacterial strains.
- Evaluation of clinical studies assessing fosfomycin's effectiveness and adverse events.
Main Results:
- Fosfomycin maintains broad-spectrum activity against Gram-positive and Gram-negative MDR/XDR bacteria.
- Recent data have clarified fosfomycin's pharmacokinetic/pharmacodynamic properties and resistance patterns.
- Information on synergy/antagonism with other antibiotics and clinical outcomes has been updated.
Conclusions:
- Fosfomycin remains a valuable therapeutic option for infections caused by MDR and XDR bacteria.
- Further research is needed to fully elucidate optimal dosing strategies and address emerging resistance concerns.
- Understanding fosfomycin's profile is crucial for managing challenging bacterial infections effectively.
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