Endomysial Antibodies IgA test is performed on a sample of blood to measure the level of Endomysial Antibodies IgA in the blood. It is performed to confirm Celiac Disease and Dermatitis Herpetiformis and also during the treatment and after the treatment of Celiac Disease and Dermatitis Herpetiformis. The specificity of this antibody typically means a very low occurrence of false positives for this test. However not all people with Celiac disease will develop Endomysial antibodies. For this reason, additional testing may be necessary even if a person receives a negative result for this test. Celiac testing is advisable for people who are experiencing symptoms associated with Celiac Disease or aware of family members who have been diagnosed with Celiac Disease.