The Endomysial Antibody IgA test, also known as the EMA test, is a simple blood test that evaluates if you have celiac disease and dermatitis herpetiformis by detecting the specific antibodies (IgA) in your blood. Endomysial antibodies (EMAs) are produced against gluten. In celiac disease, the immune system reacts abnormally to a protein called gluten.

Before the Test

Follow any instructions provided by your doctor.

Inform the healthcare provider about medications or supplements.

Stay hydrated unless instructed otherwise.

Carry any relevant medical records if available.

During the Test

A trained phlebotomist will collect the sample.

Follow the technician's instructions during collection.

Remain relaxed and still during the procedure.

Inform the technician if you feel discomfort.

After the Test

Resume normal activities unless advised otherwise.

Drink adequate fluids after sample collection.

Monitor the collection site for any unusual discomfort.

Consult your doctor regarding result interpretation.

It is recommended:

For the diagnosis of dermatitis herpetiformis and celiac disease.

It is used for monitoring adherence to the gluten-free diet in patients with dermatitis herpetiformis and celiac disease.

This is because of the high specificity of endomysial antibodies for celiac disease that the test may obviate the need for multiple small bowel biopsies to verify the diagnosis.This protein also causes dermatitis herpetiformis, a long-term (chronic) skin condition that causes itchiness and blisters.