> Think of the pioneers, traveling a few miles each day, stopping to
> camp when possible by a spring or a stream, replenishing their
> supplies. 'Course we don't know how many died along the way.
The biggest problem was not Giardia byt Typhus and othere fecal born human
pathogens.
I recently read an article about Beavers and Giardia. It seems that Beavers
downstream of human camping grounds have a much higher incidence that those
further upstream.