Have you ever wanted to drink water directly from a mountain stream?
Most of us would say yes, especially during a long hot hike! But that
fresh, clean-looking and clean-smelling water may not be safe.
microscopic parasites that can invade open water
sources, then enter your body if you take a drink. The illnesses caused by
these parasites are usually not life-threatening to those with healthy
immune systems, but they can cause a lot of discomfort.
stomach cramps and
nausea are some of the symptoms.