Related Experiment Video
Updated: Aug 6, 2026

12:18
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.
Journal of Spinal Disorders
|June 26, 1999
Summary
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.
Related Concept Videos
Staphylococcal Skin Infections
Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Mechanism of Antibiotic Resistance in MRSA
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Clinical Significance of Antibiotic Resistance
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 the One...

