Trypanosoma cruzi antibody, qualitative/quantitative (serum/plasma)
This test detects antibodies to *Trypanosoma cruzi*, a parasite that can cause Chagas disease. It helps diagnose infection after exposure.
["This test checks for past or ongoing exposure to a parasite linked to Chagas disease."]
Key facts at a glance
- LOINC
- 35682-4
- Short code
- T cruzi IgG+IgM Pnl Ser
- Synonyms
- T cruzi IgG+IgM Pnl Ser
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your healthcare provider may order this test if you have symptoms of Chagas disease (e.g., fatigue, digestive issues, heart problems) or if you’ve lived in areas where the parasite is common. It may also be used for screening in high-risk groups, such as those with exposure to infected blood or food sources.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re pregnant or breastfeeding, let your provider know before testing.
What the Test Results Mean
Positive results indicate the presence of antibodies, suggesting past or current *T. cruzi* infection. Negative results mean no detectable antibodies, but this doesn’t always rule out infection if testing was done too early. Follow-up testing or clinical evaluation may be needed.
Possible Side Effects
Minor side effects from blood draws are rare but may include bruising, slight pain, or swelling at the injection site. Rarely, allergic reactions to the testing process can occur.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Trypanosoma cruzi antibodies
Frequently asked questions
This test is critical for diagnosing Chagas disease, which can cause chronic heart or digestive problems. Early detection improves treatment options and long-term outcomes. It’s particularly important for individuals in endemic regions or those with risk factors like blood transfusions or contaminated food exposure.
The test is qualitative (yes/no) or quantitative (measuring antibody levels), depending on the lab’s method. Results may not show infection if tested too soon after exposure, so follow-up testing is sometimes recommended.
If you’ve had a recent blood transfusion or consumed potentially contaminated food, mention it to your provider. This test may also be used for prenatal screening in high-risk pregnancies.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy