Antinuclear Antibody test is a primary test used to find out if a person has any autoimmune disorder like lupus or rheumatoid arthritis that affects many healthy proteins or tissues and organs throughout the body. This blood test is also very often used to diagnose systemic lupus erythematosus (SLE). Depending on the patient’s symptoms, some other tests will be run to find out what exactly is the problem behind. The ANA IFA test helps to evaluate a person is exposed to autoimmune disorders which affect many tissues and organs throughout the body. IFA is considered as the gold standard.