Has anyone who has been sick with intestinal symptoms and has gone to Cahill NOT got the diagnosis of parasites?"
yes, there are a couple of people; I have read. In that case they must consider "cryptic giardia: and the best person for that is Dr. Martin Wolfe in Washignton DC. I used both of these amazing doctors. Too bad no body knew abotu them before, I had to suffer for a freaking year. And no mention of them on this forum.