who here knows about giardia?

"Stephen M. Henning" wrote in message
...
snip
If one must drink water of uncertain sources, boiling kills the parasite
instantly. You do not have to boil the water for 5-10 minutes. As soon
as the water comes to boil, the parasite is killed.

Boiling time is something I have seen discussed before, and the best
argument for a 5 minute boil is that at different altitudes boiling
temperatures vary. A good 5-10 minute boil is a general rule of thumb for
safety. I prefer a proper water filter system, and keep one in my pack for
all trip longer then a few hours.

BV.