Well, Amir at the parasite center in Arizona, is not very good. He has not found anything except some bogus parasite called Blastocystis, which most labs find. Anyway, I would not waste my money with Amir. Best doctor was Dr. Martin Wolfe in DC. he had his own lab, his own office in DC. Test stool on the spot.
THe other guy that is somewhat good is Dr. Cahill. But he finds E. Histolitica in a lot of people. But he does a mucus sample. And gives very little meds. Anyway, if you have strongylodies or some other helminth like fasciolisis, he will not be able to find it. You need to also do anybody testing, to check your esinophilia.