Table 1. Prevalence of Staphylococcus aureus colonization among HIV-infected adults, Atlanta, Georgia, USA, 2007–2009*.

S. aureus colonization status†	Participants, no. (%)
	At enrollment, n = 600	At 6-mo visit, n = 502	At 12-mo visit, n = 426
MRSA	79‡ (13)	66‡ (13)	62‡ (15)
MSSA	180 (30)	156 (31)	118 (28)
No S. aureus	341 (57)	280 (56)	246 (58)

*MRSA, methicillin-resistant S. aureus; MSSA, methicillin-susceptible S. aureus; PFGE, pulsed-field gel electrophoresis.
†Obtained from nares and groin swab specimens.
‡MRSA and MSSA co-colonization was detected in 11 participants at baseline, 10 participants at 6 mo, and 9 participants at 12 mo. For analysis these participants were classified as MRSA colonized. In addition, MRSA colonization with 2 distinct MRSA PFGE patterns was detected in 2 participants at baseline, 1 participant at 6 mo, and 2 participants at 12 mo.