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The ANA blood test is one of many screening tests for autoimmune disorders. Find out how this test helps doctors to identify invisible illnesses that cause chronic pain and other symptoms and learn what your test results mean.slide 1 of 4.he results of this test used to determine an ANA titer are also described as the type of fluorescent patterns that show up on the cells contained in the blood sample. Specific patterns can indicate specific autoimmune diseases.
Antinuclear Antibody Does this test have other names? ANA, fluorescent antinuclear antibody test, FANA. What is this test? This blood test is done to help your healthcare provider find out if you have an autoimmune disease. Your immune system is your body's defense system. It protects you against foreign invaders like viruses and bacteria.