i know this goes against mainstream but i think its a balance issue.
yeast is part of your immune system, you cant kill it off, you have to correct the balance...
i tradiionally find eating alot of oranges over a period of 4 days took away my chronic thrush infections and then add inulin to my diet kept them away....my gut isnt fully healed but I suffered from thrush repeatedly for almost 8 years and this method always seems to work. I've had one flair up in a year.
i also tried fasting on vivonex and then taking inulin once and had the same effect.
i tried all the candida protocols and they never worked.