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Trichuriasis (Oie) Antigen in Stool by Immunoassay

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

This test detects the presence of *Trichuris trichiura* (whipworm) antigens in your stool, helping identify an infection caused by this parasite.

Quick summary

["A positive result may indicate whipworm infection requiring treatment."]

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

Key facts at a glance

LOINC
20464-4
Short code
T gondii Ab Ser-Imp
Synonyms
T gondii Ab Ser-Imp
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like abdominal pain, diarrhea, or blood in your stool, or if you live in or traveled to an area with high parasite risk. It’s also used for diagnosing suspected whipworm infections in children or individuals with unexplained intestinal issues.

What to Expect Before the Test

No special preparation is needed. Collect a fresh stool sample in the provided container, following the instructions provided. If you’re using a kit, follow the directions carefully to ensure accurate results.

What the Test Measures

The test detects specific antigens from the whipworm parasite in your stool. Antigens are molecules that the immune system recognizes as foreign, helping confirm an active infection.

Possible Results and Their Meanings

A positive result suggests an active whipworm infection. A negative result means no detectable antigens were found, but it doesn’t rule out infection if testing was incomplete or timing was off. Follow-up testing or additional symptoms may guide further evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Stool Trichuriasis Test

Frequently asked questions

Whipworm infection can cause chronic inflammation in the intestines, leading to symptoms like persistent diarrhea, weight loss, or anemia. Early diagnosis and treatment with antiparasitic medication can prevent complications and reduce transmission to others.
This test is useful for confirming whipworm infection in stool samples, especially in areas with high prevalence. It’s not a screening test for everyone but is critical for diagnosing suspected cases.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your healthcare provider will contact you once the results are ready.
Can I take antibiotics before this test?
No, avoid taking antibiotics or antiparasitic medications for at least 2 weeks before testing, as they may interfere with the test results. Always consult your provider for personalized advice.
  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