Having a tapeworm isn't the bargain with the devil you think it is. It's hard to find a live one, the side effects are beyond nightmarish and they don't even make you lose weight.
An interview about Toxoplasma with an expert who has Toxoplasmosis.
You won't ever cure your cancer by eating cat poop, if that's what you were thinking. Dr. David J. Bzik, who has worked with toxoplasma for over a decade, is more interested in other aspects of his discovery.