These tests look for your body's reaction to gluten, the protein found in wheat, barley and rye that causes celiac disease. The blood tests aren't perfect. If your celiac blood tests are negative, it means you're much less likely to have celiac disease ... but there's still a small chance that you have it.
Autoimmune hepatitis is a disease characterized by chronic inflammation of the liver. The best way to describe this disease is to break the term down into its composite words.
Systemic lupus erythematosis is an autoimmune disease that attacks body tissues, including the lungs, kidneys, and skin. Many types of auto-antibodies are found in the blood of people with lupus. No one knows exactly what causes autoimmune diseases, but many factors seem to be involved.