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Giardiasis

Medically reviewed by Drugs.com. Last updated on Mar 3, 2024.

What is giardiasis?

Giardiasis, or giardia, is an infection of the intestines caused by a parasite. The Giardia parasite lives in the intestines of infected humans or animals. It is most often spread through direct contact. It can also spread through contaminated food or water.

What are the signs and symptoms of giardiasis?

Signs and symptoms of giardiasis usually appear within 2 weeks after exposure. You may have any of the following:

How is giardiasis diagnosed?

A sample of your bowel movement is sent to a lab for tests. You may need to give up to 3 samples over several days.

How is giardiasis treated?

Treatment options

The following list of medications are in some way related to or used in the treatment of this condition.

View more treatment options

What are the risks of giardiasis?

You may develop lactose intolerance (cannot digest milk products). Without treatment, you can develop malabsorption (cannot absorb nutrients properly). You may become dehydrated. Severe dehydration can cause organ failure, which can be life-threatening.

How can giardiasis be prevented?

How can I manage my symptoms?

What increases my risk for giardiasis?

When should I contact my healthcare provider?

When should I seek immediate care or call 911?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.