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Updated: Aug 20, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
[Impact of nasal colonization by methicillin-resistant Staphylococcus aureus among geriatric intermediate care
Karine Giraud1, Guy Chatap, Sylvie Bastuji-Garin
1Centre hospitalier Emile Roux (AP-HP), Limeil Brévannes. karine.giraud@erx.ap-hop-paris.fr
Objective:
To evaluate the impact of nasal carriage of Methicillin Resistant Staphylococcus aureus (MRSA) on antibiotic cost, infection morbidity, mortality and length of stay in a geriatric population.
Methods:
341 consecutive elderly patients (mean age 83.4 +/- 8.7 years) admitted to an intermediate care facility were prospectively include between November 1998 and October 1999. Nasal swab cultures were taken on admission.
Results:
In sixty patients (17.6%) no nasal swab was taken. Among the 281 patients screened, 52 were identified as MRSA carriers. The principle predictive factors were: diabetes (p=0,046), sores (p=0,03), malnutrition (p=0,02), polypathology (p=0,02) and prolongation of previous hospitalisation (p=0,09).
Conclusion:
Nasal carriage of MRSA on admission to the facility was not a deleterious prognostic factor regarding duration of stay, infectious morbidity and antibiotic cost, but was associated with higher mortality risk.
Insights
Nasal carriage of Methicillin-Resistant Staphylococcus aureus (MRSA) in elderly patients did not increase hospital stay or antibiotic costs. However, MRSA nasal carriers faced a higher risk of mortality.
Area of Science:
- Geriatric Medicine
- Infectious Diseases
- Clinical Microbiology
Background:
- Nasal carriage of Methicillin-Resistant Staphylococcus aureus (MRSA) is a significant concern in healthcare settings.
- Understanding the impact of MRSA carriage on patient outcomes is crucial for effective management, particularly in vulnerable populations like the elderly.
Purpose of the Study:
- To investigate the clinical and economic consequences of nasal MRSA carriage in geriatric patients admitted to an intermediate care facility.
- To assess the association between MRSA nasal carriage and antibiotic costs, infectious morbidity, mortality, and length of hospital stay.
Main Methods:
- A prospective study included 341 elderly patients (mean age 83.4 years) admitted to an intermediate care facility.
- Nasal swab cultures were performed on admission to identify MRSA carriers.
- Patient data on antibiotic use, infections, mortality, and length of stay were collected and analyzed.
Main Results:
- Of 281 screened patients, 52 (17.6%) were identified as MRSA carriers.
- Predictive factors for MRSA carriage included diabetes, sores, malnutrition, polypathology, and prolonged previous hospitalization.
- MRSA nasal carriage was not associated with increased antibiotic costs, infectious morbidity, or length of stay.
Conclusions:
- Nasal MRSA carriage upon admission to a geriatric facility was not linked to adverse outcomes in terms of hospital stay, infectious morbidity, or antibiotic expenditure.
- A significant finding was the association of MRSA nasal carriage with an elevated risk of mortality in this elderly cohort.
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