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.
RA is an autoimmune disease in which the bodyâs immune system attacks synovial membranes. These membranes surround joints. As they are attacked, they thicken with inflammation. The process begins to destroy cartilage and bone inside the joint.