Toxicity screening for Giardia intestinalis (Giardia lamblia) – qualitative stool test

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like persistent diarrhea, stomach cramps, or bloating—especially if you’ve traveled to areas with poor sanitation, had contaminated water exposure, or recently changed household pets. It’s also used to confirm a suspected Giardia infection in people with recurring symptoms or those who’ve been exposed.

What to Expect Before the Test

No special preparation is needed. You’ll provide a single stool sample in a container provided by the lab. If you’re using a home collection kit, follow the instructions carefully to ensure accuracy. Avoid using toilet paper or feminine hygiene products in the sample.

What the Test Results Mean

A positive result means the parasite was detected in your stool, confirming a Giardia infection. A negative result means the parasite was not found at the time of testing, but infection could still be present. Repeat testing may be needed if symptoms persist.

Common Symptoms of Giardia Infection

Symptoms may include watery diarrhea, stomach cramps, bloating, gas, nausea, or occasional vomiting. Some people may have mild or no symptoms at all. Symptoms can range from mild to severe and may last for weeks or months.