Giardiasis

When to call the healthcare provider

Call your healthcare provider for severe symptoms that include:

• Diarrhea

• Stomach bloating or fullness

• Upset stomach (nausea) or vomiting

• Unplanned weight loss

• Blood in your stool

• Dehydration

When to call 911

Call 911 if you have: 

• Uncontrolled vomiting

• Severe belly pain

What to expect at the healthcare provider's office

You will be examined and will likely have a stool sample checked in a lab. This stool is checked for the parasite that causes the disease. If giardiasis is suspected or confirmed, you may be prescribed medicine that you take for 5 to 7 days. In many cases, this clears the infection.

Preventing giardiasis

Giardiasis is an intestinal infection caused by the parasite Giardia

Take these steps to help prevent infection with Giardia:

• Wash your hands with clean, running water (warm or cold) after using the bathroom and before eating. Wash for at least 20 seconds. Alcohol-based hand sanitizers may not work against Giardia.

• Wash your hands each time you change a child's diaper.

• Don't drink from rivers and streams.

• Use a water treatment kit when camping. 

• Wash or peel raw fruits and vegetables before using.