Giardia is a parasite that lives in the bowels of infected animals and humans. Millions of giardia are released in feces from the infected host. The giardia can survive in soil, water, food, or surfaces of items contaminated with the feces. You can become infected with giardia by:

• Drinking contaminated water - including accidentally swallowing a bit of water while swimming or wading.
• Putting your hand or other object in your mouth that has contacted a contaminated surface
• Eating uncooked contaminated food

Giardia is present in many frontcountry and backcountry waterways. You should assume that all water you find is contaminated and needs to be treated. Pictures of sipping water from a cold mountain stream look nice, but are very risky.
Visit Water Dude for lots more information about giardia and other water-borne contaminates and water treatment procedures.

Giardia Symptoms

• Diarrhea
• Excessive flatulence (gas)
• Greasy stools
• Stomach cramps
• Nausea

Preventing Giardia

• Use uncontaminated water.
• Wash hands thoroughly with soap and water.
• Wash or peel all raw fruit and vegetables before eating.
• Ensure that water is free of giardia parasites by using one of these methods:
  • Use a water filter with a maximum absolute pore size of 1 micron or less.
  • Boil the water for at least 1 minute at...