Trypanosoma cruzi antibody, IgG, serum

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms of Chagas disease, such as fatigue, digestive issues, or heart problems. It’s also used in areas where the disease is common to screen for exposure, especially in people with risk factors like living in or traveling to endemic regions.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into a vein (usually in your arm) to draw blood. It usually takes a few minutes, and you may feel a brief pinch. If you’re nervous, let your provider know so they can help.

What the Test Results Mean

Positive results indicate the presence of antibodies, suggesting past infection with *Trypanosoma cruzi*. However, this doesn’t always mean you’re currently infected or sick. Negative results mean no detectable antibodies, which could mean you’ve never been exposed or the infection cleared on its own.

Possible Side Effects

Most people experience mild side effects like a small bruise, slight pain, or swelling at the injection site. Rarely, you might have a fever or headache. If you notice any unusual symptoms after the test, contact your provider.