I definitly think that what you're saying is true. I have read about this in Victoria Boutenko's book: "Green for life".
That when we consume alot of alkaline foods, especially dark leafy greens, the body becomes more alcaline and we produce more stomach acid, that kills the parasites.
I personally can't eat only alkaline foods, I must eat some chickpeas ect. but I focus on a 75 - 100 percent alkaline diet