Thinking about the point that Bear is trying to make ... I think you'd have to use a fair amount of caution if trying to do an enema with contaminated water. I could see using the enema as a last-ditch approach (esp. with water and electrolytes) - just as they did in Nepal. That makes sense. However, I'm not sure that introducing contaminated water into the lower intestines wouldn't add a risk of bowel infection or some type of bowel upset. You could be trading a standard stomach upset (if drinking contaminated water) against a bowel upset (if using an enema). I suppose it all depends on how contaminated the water is - and with what.

other Pete