Checklist to Prevent MRSA Surgical Site Infections

Inclusion Criteria: Retrospective Control Group Inclusion Criteria: * Patients identified in VA databases (e.g. VASQIP) by ICD-9 procedure codes as undergoing total joint arthroplasty or cardiac surgery at the 10 intervention VA Medical Centers during the 5 year preintervention period (2008-2013) Concurrent Non-equivalent Control Group Inclusion Criteria: * Patients identified in VA databases (e.g. VASQIP) by ICD-9 procedure codes as undergoing total joint arthroplasty or cardiac surgery at VA Medical Centers not included in the intervention group during the 8 years evaluated (5 years pre-intervention to match with the retrospective control group and 3 years of the intervention.) Exclusion Criteria: For All Patient Groups: * Have an ICD-9 diagnosis code consistent with endocarditis * Have any documented infection before the surgical procedure * Undergo cardiac transplants or cardiac procedures performed using the percutaneous or thoracotomy approach * Undergoing hip and knee revisions * Documented allergies to mupirocin