Toxicity Screening for Giardia intestinalis (Giardiasis) – Immunoassay

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you’ve recently traveled to areas with poor sanitation, have unexplained diarrhea or digestive issues, or have symptoms like stomach pain, gas, or nausea. It’s also used in screening for travelers or those in settings with known parasite risks.

What to Expect Before the Test

No special preparation is needed. A blood sample is taken from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause discomfort. If you’re on blood-thinning medication, let your provider know before the test.

What the Test Measures

This test detects antibodies (immunoglobulins) in your blood that your immune system produces in response to *Giardia intestinalis*. These antibodies indicate past or current infection, but they don’t confirm an active parasite presence alone.

How Results Are Interpreted

Results are qualitative (positive or negative). A positive result suggests exposure to the parasite, but it doesn’t always mean you’re currently infected. Further testing, like a stool sample, may be needed to confirm active giardiasis.