HI, Welcome to HCM. Staphylococcus aureus usually causes localised infections of the skin like boils, furuncles, folliculitis and abscesses. Intact skin as such acts as a protective barrier and does not allow bacteria like staphylococcus to cause infection. But if your skin is compromised like insect bite, deep scratches then there is a chance of this bacteria to gain entry and cause infection. I would suggest you use gloves while dealing with dressings of the patient and try to avoid direct contact with the wound. Hand washing with a strong soap and use of antiseptic solution on the hands would suffice to prevent spread. Thanks.