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Updated: Aug 8, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
Published on: May 8, 2013
Antimicrobial agents for treatment of serious infections caused by resistant Staphylococcus aureus and enterococci
1Department of Medicine, Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Boston, MA, USA. geliopou@bidmc.harvard.edu
Abstract:
As clinicians increasingly contend with infections due to staphylococci or enterococci resistant to, or failing treatment with, traditional antimicrobial agents, understanding the potential roles of older as well as more recently introduced antimicrobial agents becomes important. Older agents, such as clindamycin and trimethoprim-sulfamethoxazole, have been used to treat infections due to community-acquired methicillin-resistant Staphylococcus aureus. Among the licensed agents, quinupristin-dalfopristin, linezolid, daptomycin, and tigecycline are active in vitro against most strains of methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecium, but these agents differ in their approved clinical indications. New agents currently under investigation may further expand treatment options.
Insights
Antimicrobial resistance in staphylococci and enterococci necessitates exploring older and newer drugs. Licensed agents like linezolid and daptomycin show in vitro activity, but clinical uses vary, with new options emerging.
Area of Science:
- Microbiology and Infectious Diseases
- Pharmacology
- Clinical Medicine
Background:
- Rising antimicrobial resistance in staphylococci and enterococci poses clinical challenges.
- Traditional antimicrobial agents are increasingly failing to treat resistant infections.
- Understanding alternative and novel antimicrobial agents is crucial for effective treatment.
Purpose of the Study:
- To review the roles of older and newer antimicrobial agents against resistant staphylococci and enterococci.
- To highlight licensed agents with in vitro activity against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecium (VRE).
- To discuss the varying clinical indications of these agents and emerging treatment options.
Main Methods:
- Literature review of antimicrobial agents.
- Analysis of in vitro activity data against resistant pathogens.
- Comparison of approved clinical indications for key antimicrobial drugs.
Main Results:
- Clindamycin and trimethoprim-sulfamethoxazole are used for community-acquired MRSA infections.
- Quinupristin-dalfopristin, linezolid, daptomycin, and tigecycline exhibit in vitro activity against MRSA and VRE.
- Significant differences exist in the approved clinical indications for these licensed agents.
Conclusions:
- A range of antimicrobial agents, both established and novel, are available for treating resistant staphylococcal and enterococcal infections.
- Careful consideration of drug indications and pathogen susceptibility is essential for optimal patient outcomes.
- Ongoing research into new antimicrobial agents promises to expand future treatment strategies.
Related Concept Videos
Antimicrobial Effectiveness
Development of Antibiotic Resistance
Staphylococcal Skin Infections
Mechanism of Antibiotic Resistance in MRSA
Inhibitors of Bacterial Protein Synthesis
Clinical Significance of Antibiotic Resistance

