Healthy infants frequently acquire Staphylococcus aureus colonization; however, the modes of transmission are not well defined. In this study, 8 of 23 (35%) infants cultured at age 2 weeks acquired S aureus carriage, but only 1 infant had a family member with nasal carriage of the same clone, suggesting that sources other than colonized family members may account for a significant proportion of cases.
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