Final answer:
Methicillin is currently not used to treat staph infections. MRSA, a resistant strain of staph, requires alternative antibiotics for treatment.
Step-by-step explanation:
Methicillin is currently not used to treat staph infections. Staphylococcus aureus, commonly known as staph, is a bacterium that causes infections. Methicillin-resistant S. aureus (MRSA) is a strain of staph that is resistant to many antibiotics, including methicillin. The emergence of MRSA has made it necessary to use other antibiotics, such as trimethoprim-sulfamethoxazole, clindamycin, tetracycline, or linezolid, to treat staph infections.