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Staphylococcus aureus nasal carriage in HIV patients remains incompletely characterized. This study aimed to describe epidemiologic and molecular features of S. aureus nasal colonization in HIV outpatients. HIV outpatients with no history of hospitalization within the previous 2 years were screened for S. aureus nasal colonization. Three samples were collected from each patient, and the risk factors for colonization were assessed. The study concluded that HIV patients had a high rate of S. aureus nasal colonization. The most common characteristic of colonization was simple persistent colonization showing the same genomic profile. American Journal of Infection Control. 2008;36(3):187-91.