Shroom: lest I repeat myself, and sorry if I've already mentioned this to you, go to "www.badbugs.org". Blastocystis is very hard to get rid of, and that site chronicles the trials people have gone through in trying to get rid of it. Essentially, most of the stories on that site boil down to using a combination of specific Antibiotics to do the job - and lots of stories there of people who failed using herbs and other non- Antibiotic methods.
Bemmer, who sometimes posts on this board, is going to go through that Antibiotic program for blasto. I plan on it as well.