There is no test for endomysial antibodies of the IgM class. Endomysial antibodies are typically of the IgA class, and they are associated with celiac disease. Celiac disease is an autoimmune disorder that is triggered by the consumption of gluten, a protein found in wheat, barley, and rye. Endomysial antibodies are produced by the body in response to gluten, and they can be detected in the blood. The Endomysial Antibody IgA test is used to diagnose celiac disease by detecting the presence of these antibodies in the blood. The test is performed by taking a small sample of blood, and the results are usually available within a few days. If the test is positive, a biopsy of the small intestine may be recommended to confirm the diagnosis.