Endomysial Antibody IgA IFA in Dilutions Test
Short Name: EMA IgA IFA Dilutions
Also known as: Anti-Endomysial Antibody IgA Test, EMA IgA Immunofluorescence Assay, Endomysial Antibody Titer Test, Anti-EMA IgA in Dilutions
Endomysial Antibody IgA IFA in Dilutions Test test available at DNA Labs India for ₹5,000. Uses Immunofluorescence Assay (IFA) on Serum samples. Results in Sample collected daily by 11:00 AM. Report available the next day via online portal, email, or WhatsApp.. Free home collection in 300+ cities across India.
Overview
The primary purpose of the Endomysial Antibody IgA IFA in Dilutions test is to aid in the serological diagnosis of celiac disease. It is used to detect and quantify endomysial IgA antibodies in serum, which are highly specific markers for celiac-related intestinal mucosal damage. The test is indicated for patients presenting with symptoms suggestive of celiac disease, those with a family history of the condition, and individuals with associated autoimmune disorders. It also serves as a useful tool in monitoring dietary compliance, as antibody levels typically decline with adherence to a strict gluten-free diet.
- Test Code
- 516
- ICD Code
- K90.0
- Price
- ₹5,000
- Sample Type
- Serum
- Result Time
- Sample collected daily by 11:00 AM. Report available the next day via online portal, email, or WhatsApp.
- Fasting Required
- Yes (8 hours)
- Method
- Immunofluorescence Assay (IFA)
Sample Collection
Overnight fasting for at least 8 hours is preferred. Continue your regular gluten-containing diet for at least 6–8 weeks prior to testing to ensure accurate results. Inform your physician about all medications and supplements you are currently taking. Stay well-hydrated before the blood draw.
Method: Venipuncture
Laboratory Analysis
A trained phlebotomist will collect approximately 3 mL of blood from a vein in your arm using a standard venipuncture technique. The procedure typically takes less than 5 minutes. You may feel a brief pinch or mild discomfort at the needle insertion site.
Report Delivery
Apply gentle pressure to the puncture site with a cotton ball or gauze for 3–5 minutes to prevent bruising. Avoid heavy lifting or strenuous activity with the affected arm for a few hours. Mild soreness at the collection site is normal and typically resolves within a day.
Timeline: Sample collected daily by 11:00 AM. Report available the next day via online portal, email, or WhatsApp.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of the Endomysial Antibody IgA IFA in Dilutions test is to aid in the serological diagnosis of celiac disease. It is used to detect and quantify endomysial IgA antibodies in serum, which are highly specific markers for celiac-related intestinal mucosal damage. The test is indicated for patients presenting with symptoms suggestive of celiac disease, those with a family history of the condition, and individuals with associated autoimmune disorders. It also serves as a useful tool in monitoring dietary compliance, as antibody levels typically decline with adherence to a strict gluten-free diet.
How to Prepare
- Overnight fasting for 8 hours is preferred before sample collection
- Maintain a regular gluten-containing diet for at least 6–8 weeks before the test
- Inform the phlebotomist of any blood-thinning medications or bleeding disorders
- Wear loose-fitting sleeves to allow easy access to the arm
- Stay well-hydrated before the blood draw
- Avoid alcohol consumption for 24 hours prior to the test
Doctor's Notes
"The Endomysial Antibody IgA IFA in Dilutions test remains one of the most specific serological markers for celiac disease, with specificity approaching 99%. When combined with tissue transglutaminase IgA and a duodenal biopsy, it forms the cornerstone of celiac disease diagnosis. I recommend this test for patients presenting with chronic diarrhoea, unexplained iron-deficiency anaemia, or a family history of celiac disease. A positive result at higher titers carries a strong predictive value. However, clinicians should always correlate serological findings with histological evidence and clinical response to a gluten-free diet for a definitive diagnosis."
Test Parameters & Specifications
Sample Stability
- Hemolyzed, lipemic, or severely icteric samples
- Sample volume below the minimum requirement of 1.5 mL
- Unlabeled or mislabeled samples
- Samples collected in incorrect tube type (non-SST)
- Samples stored beyond the recommended stability window
Understanding Your Results
Negative (< 1:5)
Low probability of celiac disease in symptomatic patients with normal total IgA levels.
Borderline (1:5)
Indeterminate. Clinical correlation and follow-up testing recommended.
Positive (≥ 1:10)
Strong association with celiac disease. Higher titers correlate with more severe villous atrophy. Duodenal biopsy is recommended for definitive diagnosis.
Consult your gastroenterologist or physician if your test result is positive or borderline, if you are experiencing persistent gastrointestinal symptoms such as chronic diarrhoea, abdominal pain, bloating, or unexplained weight loss, or if you have a family history of celiac disease. Early diagnosis and initiation of a gluten-free diet under medical supervision can prevent serious long-term complications including malnutrition, osteoporosis, and increased risk of intestinal lymphoma.
Limitations
- ⚠The test alone is not diagnostic of celiac disease; confirmation with duodenal biopsy is recommended
- ⚠Specificity is high but sensitivity may be lower than tissue transglutaminase IgA (tTG-IgA) in some populations
- ⚠Results should be interpreted in conjunction with clinical history, dietary habits, and other serological markers
- ⚠False negatives can occur in patients with selective IgA deficiency
- ⚠The test does not differentiate between active and latent celiac disease
Risks & Considerations
- ●Minor bruising or swelling at the venipuncture site
- ●Brief pain or discomfort during needle insertion
- ●Rare: dizziness or lightheadedness during or after blood draw
- ●Very rare: infection at the puncture site
- ●Very rare: excessive bleeding in individuals with bleeding disorders
Interfering Factors
- ●Selective IgA deficiency may cause false-negative results; total IgA levels should be checked concurrently
- ●Patients on a gluten-free diet prior to testing may have reduced or absent antibody levels
- ●Immunosuppressive medications (e.g., corticosteroids, azathioprine) can suppress antibody production
- ●Very young children under 2 years may not yet produce detectable levels of EMA IgA
- ●Severely immunocompromised patients may yield unreliable results
Compare With Similar Tests
| Test | Endomysial Antibody IgA IFA in Dilutions Test | Tissue Transglutaminase IgA (tTG-IgA) | Deamidated Gliadin Peptide (DGP) IgA/IgG | Total Serum IgA | Anti-Gliadin Antibody IgA/IgG |
|---|---|---|---|---|---|
| Comparison | Endomysial Antibody IgA IFA in Dilutions Test | tTG-IgA is the most commonly used initial screening test for celiac disease with high sensitivity (~95%) and specificity (~95%). EMA IgA has higher specificity (~99–100%) but similar or slightly lower sensitivity, making it useful as a confirmatory test. | DGP antibodies are useful in patients with selective IgA deficiency and in children under 2 years. EMA IgA is more specific but DGP IgG may be positive when EMA is negative in IgA-deficient patients. | Total IgA measurement is essential to rule out selective IgA deficiency, which can cause false-negative EMA IgA and tTG-IgA results. If total IgA is low, IgG-based celiac markers should be ordered. | Anti-gliadin antibodies are older-generation markers with lower specificity compared to EMA IgA. They are no longer recommended as first-line tests but may have utility in monitoring dietary adherence in some cases. |
Frequently Asked Questions
What is the Endomysial Antibody IgA IFA in Dilutions test?
Why has my doctor recommended this test?
Do I need to fast before the Endomysial Antibody IgA test?
What does a positive Endomysial Antibody IgA result mean?
Can a negative result completely rule out celiac disease?
How accurate is the EMA IgA IFA in Dilutions test?
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Should I continue eating gluten before the test?
What other tests are needed to confirm celiac disease?
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