The infection can pass to others even if symptoms are not present.
The doctor will ask about your symptoms. They will ask about housing, health and travel history. The answers and a physical exam may point to an infection. The doctor will often test a sample of your stool to confirm giardiasis.
Others in your home will also need testing.
Medicines will treat the infection.
To lower your chances of giardiasis:
Wash your hands often and always:
After use the toilet
After change a diaper
Before handle or eat food
Bring bottled water for drinking, cooking, and brushing teeth.
Purify untreated water before using. This may mean boil, filter, or sterilize water.
Wash or peel raw fruits and vegetables before eating.
When traveling overseas:
Use only bottled water for drinking, cooking, or brushing teeth.
Only eat food that is well cooked and served steaming hot.
Avoid contact with stool during sex:
Use a barrier, such as dental dam, during oral-anal sex.
Wash hands after touching a condom used during anal sex.
Wash hands after contact with the anal or rectal area.
Giardiasis. Kids Health—Nemours Foundation website. Available at: https://kidshealth.org/Nemours/en/parents/giardiasis.html. Updated July 2018. Accessed September 26, 2019.
Giardiasis. Merck Manual Professional Version website. Available at: https://www.merckmanuals.com/professional/infectious-diseases/intestinal-protozoa-and-microsporidia/giardiasis. Updated October 2018. Accessed September 26, 2019.
Parasites–giardia. Centers for Disease Control and Prevention website. Available at: https://www.cdc.gov/parasites/giardia. Updated July 22, 2015. Accessed September 26, 2019.
Dental dam use. Centers for Disease Control and Prevention website. Available at: https://www.cdc.gov/condomeffectiveness/Dental-dam-use.html. Updated August 12, 2016. Accessed September 26, 2019.
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