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Updated: Aug 6, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Risk factors associated with methicillin-resistant staphylococcal wound infection after spinal surgery
J Klekamp1, D M Spengler, M J McNamara
1Department of Orthopedic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
Abstract:
We used the data from a retrospective case controlled study to identify risk factors for methicillin-resistant staphylococcal wound infection after spinal surgery. Thirty-five cases and 35 uninfected control patients were matched for indication for initial surgery and approximate operative date. Preoperative, intraoperative, and postoperative risk factors were examined. At our institution between 1989 and 1995, 35 adult patients developed spinal wound infection requiring operative debridement; 16 infections were caused by methicillin-resistant staphylococci (MRS). Significant risk factors for MRS infection were lymphopenia, history of chronic infections, alcohol abuse, recent hospitalization, and prolonged postoperative wound drainage. Patients with MRS infections were also somewhat less likely to have received vancomycin prophylaxis. In contrast, the only factor associated with infection caused by other pathogens was alcohol abuse. A number of preoperative risk factors were significantly associated with subsequent MRS spinal wound infection. Chemoprophylaxis with vancomycin should be targeted to patients at increased risk, because overuse may promote the emergence of vancomycin-resistant pathogens.
Insights
Identifying risk factors for methicillin-resistant staphylococcal (MRS) spinal wound infections is crucial. Lymphopenia, chronic infections, alcohol abuse, and recent hospitalization are key risk factors for MRS infections post-spinal surgery.
Area of Science:
- Infectious Diseases
- Surgical Site Infections
- Microbiology
Background:
- Spinal surgery can lead to wound infections, including those caused by methicillin-resistant staphylococci (MRS).
- Understanding risk factors for MRS spinal wound infections is essential for effective prevention strategies.
Purpose of the Study:
- To identify preoperative, intraoperative, and postoperative risk factors associated with methicillin-resistant staphylococcal (MRS) wound infections following spinal surgery.
- To compare risk factors for MRS infections versus infections caused by other pathogens.
Main Methods:
- Retrospective case-controlled study design.
- Matched 35 adult patients with MRS spinal wound infections to 35 uninfected controls.
- Analyzed preoperative, intraoperative, and postoperative data.
Main Results:
- Significant risk factors for MRS infection included lymphopenia, history of chronic infections, alcohol abuse, recent hospitalization, and prolonged wound drainage.
- Patients with MRS infections were less likely to have received vancomycin prophylaxis.
- Alcohol abuse was the only factor associated with infections caused by other pathogens.
Conclusions:
- Several preoperative factors significantly increase the risk of subsequent MRS spinal wound infections.
- Targeted vancomycin prophylaxis is recommended for high-risk patients to prevent the emergence of vancomycin-resistant pathogens due to overuse.
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