Screening Visit (Visit 1, Day 0) Prior to beginning any study procedures, subjects will first be asked to review and sign the informed consent form. After obtaining informed consent, the inclusion/exclusion criteria will be reviewed. A brief medical history and physical exam will be performed in helping to assess whether the subject meets the required criteria for the study. Female subjects of child-bearing potential will take a urine pregnancy test in our office to ensure that they are not pregnant. Patients who meet the inclusion and exclusion criteria will then have a skin swab performed on the lesional atopic dermatitis skin in one of their antecubital fossae (Kong et al, 2012 showed that AD subjects colonized by S. aureus have resident S. aureus bacteria throughout their skin surface, therefore we expect one swab to be sufficient), as well as a nasal culture swab to detect the presence of S. aureus in the nares. This will conclude the screening visit. The total time for this visit will be approximately 30 minutes.