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Trypanosoma cruzi antibody, qualitative/quantitative (IgG) in serum/plasma

Published: August 9, 2026Updated: August 16, 2026

This test detects antibodies to *Trypanosoma cruzi*, a parasite that can cause Chagas disease. It helps diagnose infection after initial symptoms or in chronic cases.

Quick summary

["This test checks for past or ongoing exposure to a parasite linked to Chagas disease, a condition affecting the heart, digestive system, or nervous system."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
51764-9
Short code
T cruzi IgG+IgM SerPl-Imp
Synonyms
T cruzi IgG+IgM SerPl-Imp
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 doctor may order this test if you have symptoms of Chagas disease, such as fatigue, digestive issues, or heart problems. It’s also used in screening for chronic infection, especially in regions where the parasite is common.

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein, usually in your arm. You may feel a slight pinch, but it’s quick and painless.

What the Test Results Mean

Positive results indicate the presence of antibodies, suggesting past or current infection. Negative results mean no detectable antibodies, but this doesn’t always rule out infection if testing was done too early.

Possible Side Effects

Most people experience only mild discomfort at the injection site, like a bruise or slight swelling. Rarely, there may be a small bruise or redness.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is critical for diagnosing Chagas disease, which can be asymptomatic early on. Early detection allows for better management of symptoms and potential long-term complications, such as heart or digestive system damage. It’s especially important for individuals at higher risk, like those living in endemic areas or with risk factors like blood transfusions or organ transplants.

Short name

Trypanosoma cruzi IgG antibody

Frequently asked questions

When might I need this test?
Your doctor may recommend this test if you’ve lived in or traveled to regions where Chagas disease is common, have symptoms like fatigue, digestive issues, or heart problems, or if you’ve had a blood transfusion or organ transplant in the past.
What does a positive result mean?
A positive result means your body has produced antibodies against *Trypanosoma cruzi*, indicating past or ongoing infection. This doesn’t always mean you’re currently sick, but it confirms exposure. Follow-up testing or evaluation by a specialist may be needed to assess your health.
Can I get this test at home?
No, this test requires a blood sample collected by a healthcare professional in a clinical setting. Home testing isn’t available for this specific antibody test.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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