Follow-up Visit (To occur at the time of the 7th application of the AMT cream) During the follow-up visit, subjects will return to the clinic for a quantitative wash of their lesional and non-lesional skin to determine the abundance of S. aureus at this visit. A skin swab of lesional and non-lesional skin will also be performed. This visit will conclude Experiment 2. It will last approximately 15 minutes.