All celiac disease blood tests require that you be on a gluten-containing diet to be accurate. Tissue Transglutaminase Antibodies (tTG-IgA) â The tTG-IgA test will be positive in about 98% of patients with celiac disease who are on a gluten-containing diet.
Autoimmune Disease. Autoimmune disease affects up to 50 million Americans, according to the American Autoimmune Related Diseases Association (AARDA) . An autoimmune disease develops when your immune system, which defends your body against disease, decides your healthy cells are foreign.As a result, your immune system attacks healthy cells.utoimmune Disease. Autoimmune disease affects up to 50 million Americans, according to the American Autoimmune Related Diseases Association (AARDA) . An autoimmune disease develops when your immune system, which defends your body against disease, decides your healthy cells are foreign.
Lupus is a chronic autoimmune disease that affects the skin, blood vessels, joints, heart, kidneys, nervous system, and eyes. Normally, the immune system fights off foreign invaders, such as a virus or bacteria. People with lupus, however, have an immune system that functions abnormally by attacking healthy tissue.