Endomysial Antibodies (IgA)
The Endomysial Antibodies (IgA) test is a highly specific blood test used in the diagnosis of coeliac disease, an autoimmune condition triggered by the ingestion of gluten. Gluten is a protein found in wheat, barley, and rye, and in individuals with coeliac disease, it provokes an abnormal immune response that damages the lining of the small intestine.
Endomysial antibodies (EMA) are directed against connective tissue components within the endomysium, a layer surrounding muscle fibres. The presence of these antibodies is strongly associated with coeliac disease and reflects immune-mediated damage occurring in the intestinal lining. Because of its high specificity, the EMA test is often used to confirm suspected coeliac disease following initial screening with tissue transglutaminase (tTG) antibodies.
Coeliac disease can affect individuals of all ages and may present with a wide range of symptoms or, in some cases, no obvious symptoms at all. Detecting endomysial antibodies provides valuable insight into whether the immune system is reacting abnormally to gluten exposure, helping guide diagnosis and further clinical management.
- Price: £96
- Code: EAB
- TAT: 10 Working Days
- Sample Type: Blood
Clinical Significance
The detection of endomysial antibodies (IgA) is considered one of the most reliable indicators of coeliac disease. Unlike some screening tests, EMA testing has very high specificity, meaning that a positive result strongly suggests the presence of the condition. This makes it particularly useful in confirming a diagnosis when other tests are borderline or when clinical suspicion remains high.
In coeliac disease, the immune system targets the lining of the small intestine, leading to inflammation and gradual damage to the villi, which are responsible for nutrient absorption. Over time, this damage can result in malabsorption of essential nutrients, including iron, calcium, folate, and vitamins. This may lead to complications such as anaemia, osteoporosis, fatigue, and weight loss.
EMA testing is commonly performed alongside or after tissue transglutaminase IgA testing. While tTG is often used as an initial screening test due to its sensitivity, EMA is used to confirm the diagnosis due to its higher specificity. In clinical practice, a positive EMA result, especially when combined with symptoms and supportive laboratory findings, may lead to further evaluation such as intestinal biopsy.
It is important to note that for accurate results, patients should be consuming gluten regularly before testing. A gluten-free diet prior to testing may result in false-negative results, as antibody levels may decrease when gluten is removed from the diet.
Who Might Benefit From This Test?
The Endomysial Antibodies (IgA) test may be recommended for individuals experiencing symptoms suggestive of coeliac disease. These may include chronic diarrhoea, abdominal pain, bloating, unexplained weight loss, fatigue, or nutrient deficiencies such as iron deficiency anaemia. However, not all individuals with coeliac disease present with classic gastrointestinal symptoms.
This test may also be appropriate for individuals with non-specific symptoms such as fatigue, brain fog, or joint discomfort, particularly when other causes have not been identified. In addition, individuals with a family history of coeliac disease or other autoimmune conditions may be at increased risk and benefit from testing.
Healthcare professionals may also recommend EMA testing in individuals with associated conditions such as type 1 diabetes, autoimmune thyroid disease, or dermatitis herpetiformis, as these are more commonly seen in patients with coeliac disease.
The test may also be used in follow-up care to assess adherence to a gluten-free diet, as antibody levels typically decrease once gluten is eliminated from the diet over time.
Sample Collection
This test requires a blood sample, which is collected by a trained healthcare professional using standard phlebotomy techniques. The procedure is quick, minimally invasive, and typically takes only a few minutes to complete.
The collected blood sample is sent to an accredited laboratory, where specialised immunological methods are used to detect and measure endomysial antibodies. Strict quality control measures are applied throughout the testing process to ensure accuracy and reliability of results.
No special preparation is usually required; however, it is important that patients continue to consume gluten prior to testing unless otherwise advised by their clinician, as this ensures accurate antibody detection.
Understanding Your Results
Results from the Endomysial Antibodies (IgA) test are interpreted in the context of clinical symptoms and other laboratory findings. A positive result strongly suggests the presence of coeliac disease and typically leads to further confirmatory investigations, such as a referral for gastroenterology assessment or intestinal biopsy.
A negative result makes coeliac disease less likely, particularly if the individual has normal IgA levels. However, in certain cases, additional testing may be required, especially if symptoms persist or if there is suspicion of IgA deficiency, which can affect test accuracy.
It is important to understand that laboratory results are only one part of the diagnostic process. Healthcare professionals will consider the full clinical picture, including symptoms, medical history, and other investigations, before making a definitive diagnosis.
If diagnosed with coeliac disease, management typically involves strict lifelong adherence to a gluten-free diet, which can lead to resolution of symptoms and improvement in intestinal health.
FAQs
When will I receive my results?
Results are usually available within the stated turnaround time.
Should I discuss my results with a doctor?
Yes, results should always be reviewed with a qualified healthcare professional.
Why Choose Marylebone Diagnostic Centre?
Marylebone Diagnostic Centre provides comprehensive and reliable testing for coeliac disease and other autoimmune conditions. Our tests are processed through accredited laboratories using advanced immunological techniques, ensuring high levels of accuracy and diagnostic confidence.
We offer a professional and discreet clinical environment, with experienced healthcare staff available to support you throughout the testing process. With a turnaround time of approximately 10 days, results are delivered promptly to support timely clinical decision-making.
Our commitment to quality, precision, and patient care ensures that you receive dependable results that can help guide your health journey with confidence.
Book Now
Book the Endomysial Antibodies (IgA) (EAB) test today to support accurate diagnosis of coeliac disease and gain clarity on your digestive health.
