Good suggestion. Not only will garlic eliminate e. histolytica, but it will also combat a whole range of other pathogens that Dr. Cahill -or any western doctor for that matter- cannot possibly diagnose let alone treat. Garlic also leaves the friendly flora in the intestines alone and is wonderful for unclogging the biliary ducts and removing cholesterol from the arteries. Really- it is a super food and a potent medicine. The more it burns, the better the garlic.
Some other effective protozoa fighters I have used are Samento, Cumanda, and high dose Iodine.
Especially the Iodine. Don't let your immune system fight without it!