Hi Shayna,
I started getting a bad UTI every time I got a Tysabri infusion so they switched me over to every 8 weeks. That stopped them! The last time was 7 weeks and I seem to be okay on that so I may try for 7 in the future. I also have gotten some skin staph infections, maybe one every 6-7 months or so--it wasn't MRSA, just regular staph but it needed antibiotics every time to get rid of it. And then promptly I got a stubborn yeast infection from the antibiotics. Strangely the staph is usually on my neck or behind my ears. My neurologist told me that he has seen Tysabri patients get more staph skin infections then people not on Tysabri.
Good luck beating your infections. They sound awful. A candida free diet sounds like a great idea.