stool tests are virtually worthless. If you think you may still have parasites or some toxins in your body, why don't you get antiparasitic meds on the net and take them and do an "internal cleansing". Especially if BMs irregular. Many really good products out there. Also: I once read something from some guy who had e. histolica [sp?]. I think that was the one. He said that he had taken sodium chloride tablets for seven years and was finally starting to function again. I wish I could find that post again, because I'm not certain of the details.