@MrsWinslow - The main other treatment, besides or in addition to antibiotics for MRSA or other staph infections, is surgery.
A friend of mine developed MRSA quite mysteriously. (She was under a lot of stress, but the infection was on her *abdomen.* And she had not been in the hospital or using a gym, the two big places where you can pick up MRSA.)
She had to have the infected area surgically removed. Fortunately, it was small. More serious cases can cost you big chunks of flesh, or even a limb, depending on how aggressive it is.
You are wise to be cautious at the gym. MRSA is actually one the reasons I advocate home birth (I was not eligible, myself, for my first two births, but if there is another little one I plan to go for it). Your body is used to all the germs at your house. The hospital is where you find superbugs! A healthy woman having an apparently healthy baby is not sick and doesn't belong in the hospital.