The anterior nares are the most important screening site of colonization with Staphylococcus aureus. We screened 2966 individuals for S. aureus carriage with swabs of both nares and throat. A total of 37.1% of persons were nasal carriers, and 12.8% were solely throat carriers. Screening of throat swabs significantly increases the sensitivity of detection among carriers by 25.7%.The anterior nares are considered to be the primary colonization site of Staphylococcus aureus [1][2][3]. Approximately 30% of the healthy population carries S. aureus in their anterior nares [4,5]. Carriage of S. aureus in the nose appears to play a key role in the epidemiology and pathogenesis of infection and is associated with an increased risk of infectious complications after surgery in patients with end-stage renal failure and in those with intravascular devices [1,6]. Approximately 80% of invasive nosocomial infections are of endogenous origin in nasal carriers [7,8].The emergence of methicillin-resistant S. aureus (MRSA) in hospitals and in the community has triggered many screening programs to identify carriers of S. aureus-in particular, MRSA. Early identification of carriers is a crucial step in MRSA prevention programs; this is especially true for "search and destroy" strategies, which are recommended in The Netherlands [9]. Screening of all persons who are admitted to the hospital is currently being debated in the United States.Most S. aureus screening programs that include MRSA require obtainment of a swab specimen from the anterior nares
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