Giardia lamblia (or Giardia intestinalis), the parasite that causes
giardiasis, is found in all parts of the world. But
your chances of becoming infected are highest in areas in which water treatment
facilities are limited or general sanitation is poor. When traveling in these
places or whenever you're uncertain about water quality, take these
Use only boiled or bottled water for drinking,
washing your hands, and brushing your teeth.
Avoid raw fruits and
vegetables whenever possible. (They may have been washed in contaminated
water.) If you must eat them raw, peel them first.
Don't use ice
that may have been made from contaminated water.