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Updated: Aug 29, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Trimethoprim/sulfamethoxazole for treatment of severe Staphylococcus aureus infections
1Department of Pharmacy, Tufts-New England Medical Center, Boston, MA 02111-1533, USA. madra@tufts-nemc.org
Objective:
To evaluate the role of trimethoprim/sulfamethoxazole (TMP/SMX) as an alternative to vancomycin for the treatment of severe Staphylococcus aureus infections.
Data Sources:
Clinical literature was accessed through MEDLINE (1966-February 2003) and EMBASE (1980-February 2003). Key search terms included trimethoprim/sulfamethoxazole combination and Staphylococcus aureus.
Data Synthesis:
An evaluation of case reports, case series, and clinical studies focusing on the use of TMP/SMX for treatment of severe S. aureus infections was conducted. The majority of the reports indicate that TMP/SMX may be effective for the treatment of infections due to low bacterial burdens of susceptible strains of S. aureus.
Conclusions:
In select infections, TMP/SMX may be a useful alternative to vancomycin for treatment of severe S. aureus infections. Additional randomized studies should be conducted comparing this agent with vancomycin and linezolid.
Insights
Trimethoprim/sulfamethoxazole (TMP/SMX) shows promise as an alternative to vancomycin for severe Staphylococcus aureus infections. This antibiotic combination may be effective for treating infections caused by susceptible S. aureus strains with low bacterial loads.
Area of Science:
- Infectious Diseases
- Pharmacology
- Microbiology
Background:
- Severe Staphylococcus aureus infections pose significant treatment challenges.
- Vancomycin is a primary treatment option, but concerns about resistance and toxicity exist.
- Alternative therapeutic agents are needed for effective Staphylococcus aureus infection management.
Purpose of the Study:
- To evaluate the efficacy of trimethoprim/sulfamethoxazole (TMP/SMX) as an alternative to vancomycin.
- To assess the role of TMP/SMX in treating severe Staphylococcus aureus infections.
Main Methods:
- Comprehensive literature search of MEDLINE and EMBASE databases (1966-2003).
- Inclusion of case reports, case series, and clinical studies.
- Focused search on trimethoprim/sulfamethoxazole and Staphylococcus aureus.
Main Results:
- Evidence suggests TMP/SMX may be effective in treating S. aureus infections.
- Efficacy is indicated for infections with low bacterial burdens and susceptible strains.
- TMP/SMX demonstrates potential as an alternative to vancomycin in specific scenarios.
Conclusions:
- TMP/SMX can be a viable alternative to vancomycin for select severe S. aureus infections.
- Further randomized controlled trials are recommended to compare TMP/SMX with vancomycin and linezolid.
- This evaluation highlights the potential of TMP/SMX in Staphylococcus aureus treatment strategies.
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