Pharmacotherapy for methicillin-resistant Staphylococcus aureus nosocomial pneumonia
Marisel Segarra-Newnham1, Timothy J Church
1Veterans Affairs Medical Center VAMC, West Palm Beach, FL, USA. marisel.segarra-newnham@va.gov
Objective:
To review the evidence for pharmacologic agents available in the treatment of nosocomial methicillin-resistant Staphylococcus aureus (MRSA) pneumonia.
Data Sources:
A search of PubMed (1975-July 2012) was conducted using a combination of the terms methicillin-resistant Staphylococcus aureus, pneumonia, nosocomial, vancomycin, linezolid, telavancin, ceftaroline, tigecycline, and quinupristin/dalfopristin.
Study Selection And Data Extraction:
Randomized comparative clinical trials, meta-analyses, and review articles published in English were included. A manual review of the bibliographies of available literature was conducted and all relevant information was included. Observational and in vitro studies were incorporated as indicated.
Data Synthesis:
Pharmacotherapy for the treatment of nosocomial MRSA pneumonia is limited. Vancomycin has been the treatment of choice for several years. Linezolid has demonstrated similar efficacy to vancomycin in randomized clinical trials and recent data have suggested that it may be superior in some cases, although there are limitations to this conclusion. Telavancin has also demonstrated similar clinical efficacy to vancomycin; however, the drug is not commercially available in the US. Other agents with MRSA activity include ceftaroline, clindamycin, quinupristin/dalfopristin, and tigecycline, although the evidence for their use in nosocomial pneumonia is limited.
Conclusions:
Based on the currently available evidence and cost-effectiveness, vancomycin should continue to be the drug of choice for most patients with nosocomial MRSA pneumonia. Linezolid is a reasonable alternative for patients with treatment failure while receiving vancomycin, isolates with vancomycin minimum inhibitory concentrations over 2 μg/mL, allergic reactions, or vancomycin-induced nephrotoxicity.
Insights
Vancomycin remains the primary treatment for hospital-acquired methicillin-resistant Staphylococcus aureus (MRSA) pneumonia. Linezolid offers an alternative for specific cases, including treatment failure or resistance.
Area of Science:
- Infectious Diseases
- Pharmacology
- Critical Care Medicine
Background:
- Nosocomial pneumonia caused by methicillin-resistant Staphylococcus aureus (MRSA) presents a significant therapeutic challenge.
- Effective pharmacologic options for MRSA pneumonia are limited, necessitating a review of current evidence.
Purpose of the Study:
- To critically evaluate the evidence supporting available pharmacologic agents for treating nosocomial MRSA pneumonia.
- To identify the most effective and cost-efficient treatment strategies.
Main Methods:
- A comprehensive literature search of PubMed (1975-July 2012) was performed.
- Included studies comprised randomized comparative clinical trials, meta-analyses, and review articles.
- Observational and in vitro data were incorporated to supplement findings.
Main Results:
- Vancomycin is the established first-line agent for nosocomial MRSA pneumonia.
- Linezolid demonstrated comparable efficacy to vancomycin, with potential advantages in certain scenarios.
- Telavancin showed similar efficacy but is not widely available; other agents have limited evidence for this indication.
Conclusions:
- Vancomycin is recommended as the initial treatment of choice for most patients due to evidence and cost-effectiveness.
- Linezolid serves as a viable alternative for patients experiencing vancomycin treatment failure, intolerance, or specific resistance patterns.
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