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Updated: Aug 22, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
Published on: May 8, 2013
Staphylococcus aureus with reduced susceptibility to vancomycin
S E Cosgrove1, K C Carroll, T M Perl
1Division of Infectious Disease, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA. scosgro1@jhmi.edu
Abstract:
Infections with Staphylococcus aureus with reduced susceptibility to vancomycin continue to be reported, including 2 cases caused by S. aureus isolates with full resistance to vancomycin. This review first outlines the definitions of vancomycin-intermediate S. aureus (VISA) and vancomycin-resistant S. aureus (VRSA) and risk factors for infection. Next, we describe the mechanisms of resistance and methods of laboratory detection of the organisms. Finally, we address infection control and management issues associated with isolation of VISA and VRSA.
Insights
Vancomycin-resistant Staphylococcus aureus (VRSA) and vancomycin-intermediate S. aureus (VISA) infections are increasing. This review covers definitions, risk factors, detection, and management strategies for these challenging infections.
Area of Science:
- Microbiology
- Infectious Diseases
- Antimicrobial Resistance
Background:
- Rising incidence of Staphylococcus aureus infections with reduced vancomycin susceptibility.
- Emergence of vancomycin-intermediate S. aureus (VISA) and vancomycin-resistant S. aureus (VRSA) necessitates updated guidance.
Purpose of the Study:
- To define VISA and VRSA and identify associated risk factors.
- To elucidate mechanisms of vancomycin resistance in S. aureus.
- To detail laboratory detection methods and discuss infection control and management.
Main Methods:
- Literature review of definitions, risk factors, resistance mechanisms, detection methods, and clinical management.
- Synthesis of current knowledge on VISA and VRSA.
Main Results:
- Clear definitions provided for VISA and VRSA.
- Key risk factors and mechanisms of resistance are outlined.
- Laboratory detection strategies and infection control measures are discussed.
Conclusions:
- Effective management of VISA and VRSA requires understanding resistance mechanisms and implementing robust infection control.
- Early detection and appropriate treatment are crucial for improving patient outcomes and preventing spread.
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