Abstract
The clinical investigation of patients with potential Celiac disease currently encompasses a large differential diagnosis including food allergies, medications, bacterial, viral and parasitic infection, AIDS, and Crohn9s disease. The large diagnostic selection, coupled with a vast array of serological markers as well the self-treatment of patients makes diagnosing Celiac disease difficult. A newer marker, anti-deamidated gliadin peptide, should be paired with both the total serum IgA and anti-tissue transglutaminase IgA and IgG for screening symptomatic patients on a gluten diet for best diagnosis. Those patients that test positive by deamidated gliadin peptide and/or anti-tissue transglutaminase should then be confirmed with HLA typing and/or biopsy and started on a gluten-free diet sooner, reducing the destructive effects gluten can do on the intestine. ABBREVIATIONS:CD - celiac disease, GFD - gluten free diet, AGA - anti-gliadin antibodies, TTG - anti-tissue transglutaminase antibodies, EMA - anti-endomysial antibodies, ARA - anti-reticulin antibodies, DGP - anti-deamidated gliadin peptide antibodies, IEL - intraepithelial lymphocytes, GALT - gut-associated lymphoid tissue, EATL - enteropathy-associated T-cell lymphoma.
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