Blastocystis Hominis AND Dientamoeba Fragilis are two of the protzoa parasites. They are also some of the hardest to get rid of! Up until very recently, they were classified as types of YEAST! Now they are correctly classified as parasites. Some of the prescribed medications are; metronidazole, tinidazole and secidazole and the side effects of these can be horrific with NO guaranteed cure. Herbs that are effective include Black-Walnut and cloves and the herbs that are effective in candida treatment. Regular parasite removal usually takes 30 days, however, in your case I would recommend at least 90 days worth of a strong parasite remover. These two parasites have an amazing life and reproduction cycle and that is why your parasite cleanser needs to be taken for a longer period of time. Blastocystis especially, THRIVES on carbs so try to eleminate ALL carbs from your diet if possible. They don't reproduce as well when they don't have their proper nutrition. I hope this helps.