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Celiac disease blood tests measure the amount of particular antibodies in the blood. The most common tests include: Tissue transglutaminase antibody (tTG), IgA class â the primary test ordered to screen for celiac disease.
Blood tests. There are specific blood tests used to diagnose coeliac disease. They look for antibodies that the body makes in response to eating gluten. Your GP will carry out a simple blood test to check for these antibodies.The most accurate blood tests for coeliac disease are: 1  Tissue transglutaminase antibody (shortened to 'tTGA').2  Endomysial antibody (shortened to 'EMA').f you are IgA deficient your GP will need to test you differently for the condition. NICE has issued national guidance on recognising coeliac disease. They recommend that a different test for coeliac disease (an IgG tTGA and/or IgG EMA test) is used if a person is confirmed as having IgA deficiency.