Related Experiment Video
Updated: Jun 3, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
[Egg crater mattresses: a deposit of methicillin-resistant staphylococcus aureus?]
Adriano Menis Ferreira1, Denise de Andrade, Margarete Teresa Gottardo de Almeida
1Departamento de Enfermagem, Universidade Federal de Mato Grosso do Sul, Brazil. a.amr@ig.com.br
Abstract:
The purpose of this study was to evaluate the microbiological conditions of the egg crater mattress in hospital use to identify the presence of Staphylococcus aureus and its methicillin-resistance phenotype (MRSA). Petrifilm plates were used to collect the microbiological data from the mattresses, in pre-established positions. A total 180 plates were collected in 15 mattresses, 139 (72.2%) of which were positive for Staphylococcus aureus. Of the positive plates, 77 (55.4%) were collected before and 62 (44.6%) after washing the mattresses. There was a significant reduction (p=0.023) in Colony Forming Units (CFU); however, regarding the resistance profile, 8 (53.3%) mattresses with MRSA were identified. Results show the risk of these mattresses acting as a secondary deposit in the infection chain, especially regarding the presence of MRSA.
Insights
Hospital egg crater mattresses frequently harbor Staphylococcus aureus, including dangerous methicillin-resistant strains (MRSA). While washing reduces bacterial counts, MRSA persists, posing an infection risk.
Area of Science:
- Microbiology
- Infection Control
- Healthcare-Associated Infections
Context:
- Hospital-acquired infections are a significant concern in healthcare settings.
- Egg crater mattresses are commonly used patient support surfaces.
- Microbial contamination of medical equipment can facilitate pathogen transmission.
Purpose:
- To assess the microbiological contamination of hospital egg crater mattresses.
- To detect the presence and prevalence of Staphylococcus aureus.
- To identify methicillin-resistant Staphylococcus aureus (MRSA) on these surfaces.
Summary:
- Microbiological analysis using Petrifilm plates was conducted on 15 hospital egg crater mattresses.
- Staphylococcus aureus was detected on 72.2% of sampled locations.
- Despite washing, 53.3% of mattresses still harbored MRSA, indicating a persistent contamination risk.
Impact:
- Highlights the potential for egg crater mattresses to serve as reservoirs for pathogenic bacteria.
- Underscores the need for enhanced cleaning protocols to effectively eliminate MRSA.
- Emphasizes the role of environmental hygiene in breaking the chain of hospital infections.
Related Concept Videos
Clinical Significance of Antibiotic Resistance
Staphylococcal Skin Infections
Mechanism of Antibiotic Resistance in MRSA

