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Staphylococcus aureus is a Gram-positive pathogen. It has evolved to colonize humans and often animals that have close contact with humans (1). Approximately 20% to 30% of the population (20–30% of people having persistent nasal bacterial colonization (30, 31, 32)), is asymptomatically colonized by Staphylococcus aureus (17, 18, 19, 20). It is a tough germ known for being hard to kill with antibiotics and having many ways to cause disease. These include making toxins, forming protective layers called biofilms, and avoiding the [immune system](brain://2OKS_0bBCEqG6E6Mvot5uQ/HostDefenseIm…