I believe I have a protozoa too. I once had 100% improvement on my symptoms on the blastocystis triple drug therapy 1.5 years ago which lasted about 1 1/2 weeks. I suspect I still have some sort of protozoa infection that got 'beat down' but came back.
I'm certain I have significant candida as well tho as I suffer horrendous die off on antifungals.