Diseases Home > Giardiasis Risk Factors and Prevention

Who Is at Risk for Giardiasis?

Anyone can get giardiasis. People more likely to become infected include:
  • Children who attend daycare centers, including diaper-aged children
  • Parents of infected children
  • International travelers
  • Childcare workers
  • People who swallow water from contaminated sources
  • Backpackers, hikers, and campers who drink unfiltered, untreated water
  • Swimmers who swallow water while swimming in lakes, rivers, ponds, and streams
  • People who drink from shallow wells.
Contaminated water includes water that has not been boiled, filtered, or disinfected with chemicals. Several community-wide outbreaks of giardiasis have been linked to drinking municipal water or recreational water contaminated with Giardia.


There are several things a person can do to prevent giardiasis. Some of these include:
  • Practicing good hygiene
  • Avoiding water that might be contaminated
  • Avoiding food that might be contaminated
  • Avoiding fecal exposure during sexual activity.

Other Giardiasis Information

For additional information about giardiasis, click any of the following links:
Written by/reviewed by:
Last reviewed by: Arthur Schoenstadt, MD
Last updated/reviewed:
List of references (click here):
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