Is MRSA different that staph aureus?

Yes, MRSA (Methicillin-Resistant Staphylococcus Aureus) is a specific strain of Staphylococcus aureus that has developed resistance to methicillin and other antibiotics. While all MRSA is Staphylococcus aureus, not all Staphylococcus aureus is MRSA. This resistance makes MRSA infections more challenging to treat compared to non-resistant strains of Staphylococcus aureus.