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FAQ: e. histolytica is a protozoa parasite that is detrimental to one's health which conventional testing has failed to detect properly. There are a number of people who tested both through conventional labs and Metametrix in which the former failed to detect and the latter (Metametrix) simply came back with a PPTU diagnosis (Parasite Present Taxonomy Unavailable). Follow up emails with Metametrix failed to clarify why this is/was happening.
Currently the only reliable means of testing are antigen stool testing and Dr. Cahill in NYC. However I think there have been those who have tested via antigen who received a false negative. Dr. Cahill uses a novel approach in diagnosing where others have failed including conventional colonoscopies. This thread should guide you in the treatment strategies.