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Combination therapy for Gram-negative bacteria: what is the evidence?
Joumana G Kmeid1, Mona M Youssef, Zeina A Kanafani
1Department of Internal Medicine, American University of Beirut Medical Center, Division of Infectious Diseases, Beirut, Lebanon.
Expert Review of Anti-Infective Therapy
|October 31, 2013
Summary
Combination therapy shows promise for treating multidrug-resistant Gram-negative bacterial infections, but clinical evidence is limited. More randomized trials are needed to confirm the efficacy of these antimicrobial combinations.
Area of Science:
- Infectious Diseases
- Microbiology
- Pharmacology
Background:
- Multidrug-resistant Gram-negative bacteria pose a significant therapeutic challenge due to limited treatment options.
- Combination antimicrobial therapy is being explored to improve treatment efficacy and combat resistance.
Purpose of the Study:
- To review current evidence on combination therapy for infections caused by specific multidrug-resistant Gram-negative pathogens.
- To critically appraise the available data and provide recommendations for clinical practice.
Main Methods:
- Literature review of studies evaluating combination therapy against Pseudomonas aeruginosa, carbapenem-resistant Enterobacteriaceae, Acinetobacter species, and Stenotrophomonas maltophilia.
- Analysis of in vitro synergy data and available clinical evidence, including observational studies.
Main Results:
- Numerous combination regimens have shown promising in vitro synergy against target pathogens.
- Clinical data supporting combination therapy are scarce, primarily consisting of retrospective and observational studies.
Conclusions:
- While in vitro data suggest benefits, robust clinical evidence from randomized trials is lacking.
- Further well-designed clinical trials are essential to establish the efficacy of combination antimicrobial therapy for these challenging infections.
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