Beachdoc are you still with us? Cryptosporidium seems to be the latest wilderness bogeyman ( supplanting lymne disease and Susquatch.) I have to wonder if we are also handicapping ourselves from the outset. It's a given most people are in a state of dehydration in daily life. Caffeins, sugars ( all the good stuff ;O) are often actually detrimental. It is no accident that a cultured yogurt after intestinal illness quickly restores our gut flora. We need to learn more!