Final answer:
Vancomycin (Vancocin) is typically expected to be chosen for treating a pressure ulcer infected by MRSA, as it is effective against this type of resistant bacteria.
Step-by-step explanation:
For a patient with a pressure ulcer infected by multidrug-resistant Staphylococcus aureus (MRSA), the nurse would expect vancomycin (Vancocin) to be chosen for therapy. This is because vancomycin is effective against gram-positive organisms, including MRSA, and is commonly used when infections are resistant to other antibiotics. Despite the emergence of vancomycin-resistant strains, it remains one of the last lines of defense against severe infections by resistant bacteria like MRSA.