I know I've improved, but definitely not cured of candida. I believe it takes a strict diet and use of natural anti-fungals and strong probiotics to completely eradicate it.
I haven't been very strict about my diet lately, so the anti-fungals and probiotics can only do so much.
As for the saliva test, I haven't done that since 2009. My spit did show the telltale signs of branching out, or growing "legs", etc. that is associated with having candida. I already knew I had it because of all my symptoms.