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Updated: Jun 11, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Institutional prescreening for detection and eradication of methicillin-resistant Staphylococcus aureus in patients
David H Kim1, Maureen Spencer, Susan M Davidson
1Department of Orthopaedic Surgery, New England Baptist Hospital, 125 Parker Hill Avenue, Boston, MA 02120, USA. dhkim@caregroup.harvard.edu
Background:
Surgical site infection has been identified as one of the most important preventable sources of morbidity and mortality associated with medical treatment. The purpose of the present study was to evaluate the feasibility and efficacy of an institutional prescreening program for the preoperative detection and eradication of both methicillin-resistant and methicillin-sensitive Staphylococcus aureus in patients undergoing elective orthopaedic surgery.
Methods:
Data were collected prospectively during a single-center study. A universal prescreening program, employing rapid polymerase chain reaction analysis of nasal swabs followed by an eradication protocol of intranasal mupirocin and chlorhexidine showers for identified carriers, was implemented. Surgical site infection rates were calculated and compared with a historical control period immediately preceding the start of the screening program.
Results:
During the study period, 7019 of 7338 patients underwent preoperative screening before elective surgery, for a successful screening rate of 95.7%. One thousand five hundred and eighty-eight (22.6%) of the patients were identified as Staphylococcus aureus carriers, and 309 (4.4%) were identified as methicillin-resistant Staphylococcus aureus carriers. A significantly higher rate of surgical site infection was observed among methicillin-resistant Staphylococcus aureus carriers (0.97%; three of 309) compared with noncarriers (0.14%; seven of 5122) (p = 0.0162). Although a higher rate of surgical site infection was also observed among methicillin-sensitive Staphylococcus aureus carriers (0.19%; three of 1588) compared with noncarriers, this difference did not achieve significance (p = 0.709). Overall, thirteen cases of surgical site infection were identified during the study period, for an institutional infection rate of 0.19%. This rate was significantly lower than that observed during the control period (0.45%; twenty-four cases of surgical site infection among 5293 patients) (p = 0.0093).
Conclusions:
Implementation of an institution-wide prescreening program for the identification and eradication of methicillin-resistant and methicillin-sensitive Staphylococcus aureus carrier status among patients undergoing elective orthopaedic surgery is feasible and can lead to significant reductions in postoperative rates of surgical site infection.
Level Of Evidence:
Therapeutic Level III. See Instructions to Authors for a complete description of levels of evidence.
Insights
Preoperative screening for Staphylococcus aureus carriers in orthopedic surgery patients is feasible and effective. This program significantly reduced surgical site infections, demonstrating its value in preventing complications.
Area of Science:
- Infectious Disease
- Surgical Outcomes
- Public Health
Background:
- Surgical site infections (SSIs) are a major cause of patient morbidity and mortality.
- Preventing SSIs is crucial for improving patient outcomes and reducing healthcare costs.
- Staphylococcus aureus, including methicillin-resistant strains (MRSA), is a common pathogen causing SSIs.
Purpose of the Study:
- To assess the feasibility and effectiveness of a prescreening program for Staphylococcus aureus (S. aureus) carriers.
- To detect and eradicate both methicillin-resistant (MRSA) and methicillin-sensitive (MSSA) S. aureus preoperatively.
- To reduce SSI rates in patients undergoing elective orthopedic surgery.
Main Methods:
- Prospective single-center study involving universal preoperative screening of nasal swabs using rapid polymerase chain reaction.
- Implementation of an eradication protocol for identified S. aureus carriers (intranasal mupirocin and chlorhexidine showers).
- Comparison of SSI rates with a historical control period preceding the screening program.
Main Results:
- A 95.7% screening success rate was achieved in 7019 patients.
- S. aureus carriers identified in 22.6% of patients; MRSA carriers in 4.4%.
- The overall institutional SSI rate decreased significantly from 0.45% in the control period to 0.19% post-implementation (p=0.0093).
Conclusions:
- An institutional prescreening program for S. aureus carrier status is feasible.
- This program effectively reduces postoperative SSI rates in elective orthopedic surgery.
- Preoperative identification and eradication of S. aureus carriers improve surgical outcomes.
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