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Related Concept Videos

Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Automated Microbial Diagnostics01:24

Automated Microbial Diagnostics

Automated diagnostic analyzers have transformed clinical microbiology by providing rapid and reliable methods for pathogen identification and antibiotic susceptibility testing. Among these systems, the Vitek 2 is widely used because it automates the traditionally labor-intensive processes of microbial identification (ID) and antibiotic susceptibility testing (AST), delivering standardized and timely results that are essential for effective patient care.Microbial Identification with ID CardsThe...
Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Urine Studies II: Urine Culture and Sensitivity Test01:26

Urine Studies II: Urine Culture and Sensitivity Test

A urine culture and sensitivity test is a diagnostic procedure used to identify urinary tract bacterial infections and determine the most effective antibiotics for treatment. This test is generally preferred when a patient shows manifestations of a urinary tract infection, such as frequent or painful urination, cloudy or foul-smelling urine, or lower abdominal pain.Purpose of the TestThe primary goals of a urine culture and sensitivity test are to:Determine the specific bacteria causing the...

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Updated: May 14, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
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Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria

Published on: May 8, 2013

Rapid testing for methicillin-resistant Staphylococcus aureus: implications for antimicrobial stewardship.

Krystina Geiger1, Jack Brown

  • 1School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York (SUNY), NY 14260, USA.

American Journal of Health-System Pharmacy : AJHP : Official Journal of the American Society of Health-System Pharmacists
|February 2, 2013
PubMed
Summary

Rapid methicillin-resistant Staphylococcus aureus (MRSA) assays significantly reduce lab times for faster infection identification. These tests aid antimicrobial stewardship but require careful evaluation for optimal clinical use.

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Stress-induced Antibiotic Susceptibility Testing on a Chip
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Last Updated: May 14, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
14:04

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria

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Stress-induced Antibiotic Susceptibility Testing on a Chip
12:41

Stress-induced Antibiotic Susceptibility Testing on a Chip

Published on: January 8, 2014

Area of Science:

  • Clinical microbiology
  • Infectious diseases
  • Antimicrobial stewardship

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant healthcare challenge.
  • Rapid diagnostic tests are crucial for timely clinical decision-making.

Purpose of the Study:

  • To review rapid MRSA assays and their role in antimicrobial stewardship.
  • To analyze the performance and limitations of current rapid MRSA detection methods.

Main Methods:

  • Review of rapid MRSA assays, including polymerase chain reaction (PCR) and bacteriophage-based technologies.
  • Analysis of Food and Drug Administration (FDA)-approved tests for specific clinical specimens.
  • Evaluation of assay sensitivity, specificity, and turnaround times.

Main Results:

  • Rapid MRSA assays reduce laboratory turnaround time from 48-96 hours to 1-5 hours.
  • Most assays demonstrate high sensitivity (91-100%) and specificity (95-100%).
  • One test was withdrawn due to unacceptable false results; limited data exists on patient outcomes and cost-effectiveness.

Conclusions:

  • Rapid MRSA assays offer significant time savings over standard methods.
  • Assay performance varies; careful consideration of cost, reliability, and result communication is essential.
  • The optimal role of rapid MRSA tests in antimicrobial stewardship programs requires further definition.