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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...

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Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria

Published on: May 8, 2013

Screening for methicillin-resistant Staphylococcus aureus colonization using sponges.

Chang-Seop Lee¹, Bianca Montalmont¹, Jessica A O'Hara¹

¹1Division of Infectious Diseases,University of Pittsburgh School of Medicine,Pittsburgh,Pennsylvania.

Infection Control and Hospital Epidemiology

|January 29, 2015

Summary

This summary is machine-generated.

Adding skin sponge screening significantly improves methicillin-resistant Staphylococcus aureus (MRSA) detection compared to nasal swabs alone. This enhanced method increases carrier identification, crucial for infection control in hospitalized patients.

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Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA

Published on: February 9, 2011

Area of Science:

Infectious Diseases
Microbiology
Clinical Diagnostics

Background:

Nasal swab culture is the standard for identifying methicillin-resistant Staphylococcus aureus (MRSA) carriers.
This method has limitations, missing a significant number of MRSA carriers with infections elsewhere on the body.

Purpose of the Study:

To investigate if using skin sponges for sample collection improves MRSA detection sensitivity.
To compare the efficacy of combined swab and sponge sampling versus traditional nasal swabbing.

Main Methods:

105 hospitalized patients with recent MRSA infection were screened.
Samples were collected from forehead, nostrils, pharynx, axilla, and groin using swabs.
Additional samples were collected from forehead, axilla, and groin using sponges.
Staphylococcal cassette chromosome mec (SCCmec) typing was performed using PCR.

Main Results:

MRSA was detected in at least one specimen from 56.2% of patients.
Combined sponge and nasal swab screening detected 86.4% of MRSA carriers, significantly higher than nasal swab alone (50.9%).
Detection sensitivities were 79.7% for swabs and 64.4% for sponges individually.

Conclusions:

Integrating skin sponge screening with standard nasal swabs substantially enhances MRSA detection rates.
This improved sensitivity is vital for effective MRSA carrier identification and infection control strategies.