What Is the Best Method to Prevent the Spread of Infection

What is the best method to prevent the spread of infection when the nurse is changing the dressing over a wound infected with Staphylococcus aureus?

A) Change the dressing using sterile gloves.
B) Soak the dressing in sterile normal saline.
C) Apply antibiotic ointment over the wound.
D) Wash hands and properly dispose of soiled dressings.