Final answer:
The antibiotic Mupirocin (Bactroban) is commonly prescribed for MRSA skin infections, as it is especially effective against this resistant strain of Staphylococcus aureus.
Step-by-step explanation:
A nurse caring for a client with a MRSA (Methicillin Resistant Staph Aureus) skin infection would expect the primary health care provider to prescribe an antibiotic effective against MRSA. Among the options provided, Mupirocin (Bactroban) is typically used for topical treatment of MRSA skin infections. Mupirocin has a unique mechanism of action, effective against certain bacteria including MRSA, and is often used for decolonization in nasal carriers of MRSA.
Other options such as Acyclovir/Zovirax, Metronidazole/Metro-Gel, and Ketoconozole/Nizoral are not primarily used for MRSA infections, as they are antivirals or antifungals, targeting different types of pathogens. Certain other oral or intravenous antibiotics such as trimethoprim-sulfamethoxazole (TMP/SMZ), clindamycin, tetracyclines like doxycycline or minocycline, or linezolid may also be used based on antibiotic sensitivity and the severity of the infection.