<<Disclaimer: Verify this information before applying it to your situation.>> There are three serum tests (EMA, ARA, AGA) for the detection of celiac disease. According to the criteria set forth by the European Society for Pediatric Gastroenterology and Nutrition (ESPGAN), two of the three serological tests must be positive for the diagnosis of CD. EMA has proven to provide the highest degree of specificity and sensitivity. Results will vary somewhat according to the expertise of the laboratory and the experience of the laboratory personnel. If you have any questions, I would be glad to hear from you. Vijay Kumar, Ph.D., F.A.C.B.