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Updated: Aug 7, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
Published on: May 8, 2013
Overview of resistant gram-positive pathogens in the surgical patient
1Division of Pharmacy Practice and Science, University Hospital, University of Kentucky Medical School, Lexington, KY 40536-0082, USA. rprapp01@pop.uky.edu
Abstract:
Staphylococci and enterococci are the most common pathogens in surgical-site and bloodstream infections. The emergence of drug resistance among these gram-positive bacteria thus poses a substantial threat to patients with surgical infections. Resistance to methicillin/oxacillin is frequently observed in Staphylococcus aureus isolates and is often accompanied by multidrug resistance. Vancomycin is usually the treatment of choice for infections caused by methicillin-resistant S. aureus (MRSA), so the recent appearance of S. aureus isolated with intermediate sensitivity to vancomycin is cause for concern. Vancomycin resistance has already appeared in most species of enterococci. Infections caused by vancomycin-resistant enterococci (VRE) are associated with increased mortality compared to infections caused by vancomycin-sensitive isolates. Measures for preventing vancomycin resistance include reducing the use of vancomycin and other agents that appear to be associated with VRE, including third-generation cephalosporins and anti-anaerobic drugs. Third-generation cephalosporins have also been implicated in the increased prevalence of MRSA infections. Prudent use of existing antibiotics is an essential strategy for combating the rising tide of drug-resistant gram-positive pathogens.
Insights
Drug-resistant Staphylococci and Enterococci are a major threat in surgical infections. Prudent antibiotic use is crucial to combat rising resistance, especially for Methicillin-Resistant Staphylococcus Aureus (MRSA) and Vancomycin-Resistant Enterococci (VRE).
Area of Science:
- Infectious Diseases
- Microbiology
- Clinical Medicine
Background:
- Staphylococci and enterococci are leading causes of surgical-site and bloodstream infections.
- The rise of antibiotic resistance in these gram-positive bacteria presents a significant clinical challenge.
- Methicillin/oxacillin resistance in Staphylococcus aureus (MRSA) is common and often linked to multidrug resistance.
Purpose of the Study:
- To highlight the growing threat of antibiotic resistance in common Gram-positive pathogens.
- To discuss the implications of emerging resistance to key antibiotics like vancomycin.
- To emphasize the need for strategies to combat antimicrobial resistance.
Main Methods:
- Review of current literature on antibiotic resistance trends in Staphylococci and Enterococci.
- Analysis of the clinical impact of drug-resistant pathogens.
- Examination of factors contributing to the emergence of resistance.
Main Results:
- Methicillin-resistant Staphylococcus aureus (MRSA) infections are increasing, with some strains showing intermediate vancomycin sensitivity.
- Vancomycin resistance is prevalent in Enterococci (VRE), leading to higher mortality rates.
- Third-generation cephalosporins and anti-anaerobic drugs are associated with VRE and MRSA prevalence.
Conclusions:
- Prudent use of existing antibiotics is essential to combat drug-resistant Gram-positive pathogens.
- Reducing vancomycin usage and other implicated agents may help prevent resistance.
- Effective infection control and antibiotic stewardship are vital to mitigate patient risk.
Related Concept Videos
Acute Pyelonephritis II: Diagnostic Studies and Management
Development of Antibiotic Resistance
Microbiota of the Respiratory Tract
Staphylococcal Skin Infections
Mechanism of Antibiotic Resistance in MRSA
Clinical Significance of Antibiotic Resistance

