Abstract
Intranasal carrier status of Methicillin-sensitive Staphylococcus aureus (MSSA), and Methicillin-resistant Staphylococcus aureus (MRSA) has been shown to be a significant risk factor for developing surgical site infections. To determine if current treatment protocol for positive nasal screen was effective at decolonizing carriers 289 consecutive patients undergoing primary or revision total joint arthroplasty were screened preoperatively. Those patients with positive cultures were treated with a 5-day course of intranasal mupirocin. Preoperatively 44 (15.2%) patients tested positive for MSSA colonization, and 12 (4.2%) patients for MRSA. Testing on the day of surgery revealed 15 (5.2%) patients with MSSA positive cultures, and 1 (0.35%) patient with a MRSA positive culture. Reduction of MSSA and MRSA colonization was statistically significant (P=0.0341, P=0.0073 respectively). Our overall results indicate that our current decolonization protocol with nasal mupirocin was effective in reducing MSSA and MRSA colonization, although a significant number of patients remained positive for MSSA.
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