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Chagas Disease Antibody Screening (Qualitative) by Immunofluorescence

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

This test checks for antibodies to the parasite *Trypanosoma cruzi*, which causes Chagas disease—a chronic infection linked to poverty and poor sanitation. It helps determine if you’ve been exposed to the parasite.

Quick summary

["This screening identifies potential exposure to Chagas disease, which can affect the heart or digestive system over time."]

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

Key facts at a glance

LOINC
34710-4
Short code
C trach Ag Anal Ql
Synonyms
C trach Ag Anal Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
86038
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 recommend this test if you live in or traveled to regions where Chagas disease is common (e.g., Latin America), have symptoms like fatigue, digestive issues, or heart problems, or were exposed to risk factors like contaminated food/water or close contact with infected animals.

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein, similar to other routine blood tests. Results are qualitative (positive/negative) rather than quantifiable.

What the Test Results Mean

A positive result suggests exposure to the parasite, but does not always mean active infection. Follow-up testing (like a confirmatory assay) may be needed for diagnosis. A negative result means no detectable antibodies at this time.

Possible Symptoms of Chagas Disease

Chagas disease often has no symptoms early on. Later, it may cause heart rhythm problems, digestive issues (like swelling of the esophagus or colon), or swelling of the face/eyes (Romana sign). Symptoms vary widely.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Chagas Antibody Screen (IF)

Frequently asked questions

Could I get this test if I’m pregnant?
Yes, this test is generally safe during pregnancy. However, discuss any concerns with your healthcare provider, as some regions with Chagas disease also have other infectious risks.
What if my test is positive?
A positive result means you may have been exposed to the parasite. Your doctor will likely order additional tests (like a confirmatory immunoassay) to check for active infection. Treatment options exist for early-stage disease but are less effective if symptoms are already present.
Does this test detect active infection?
No, this screening test only detects antibodies (indicating past exposure). Active infection requires specialized tests like enzyme-linked immunosorbent assay (ELISA) or indirect immunofluorescence antibody testing.
  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