The Immunoglobulin A or IgA test is used to assess the levels of IgA antibodies in the blood. This test aids in screening of autoimmune disorders and cancers, however, the test cannot pinpoint the exact cause of the IgA level fluctuations and correlation with other tests is necessary to find out the root cause for fluctuations in IgA levels. Book IgA test from Thyrocare at a low cost with a home collection facility.