What is an IgA Test?
Immunoglobulin A is the most common antibody in blood. Antibodies, like IgA, are nothing more than proteins designed to attack and fight off foreign bodies like bacteria and toxins. The level of IgA is highest in the gastro and respiratory tracts. Elevated IgA levels can be indicative of lupus, celiac disease and a myriad of autoimmune diseases.
IgA works with IgG (Immunoglobulin G) and IgM (Immunoglobulin M) to make up the immune system response. When blood tests are ordered to diagnose or rule of a problem with the immune system, all three immunoglobulins are tested - not just one.
Normal Value Range
- Negative Pregnancy Adult: 70 to 350 mg/dL or 0.70 to 3.50 g/L
- Pregnancy Trimester One: 21 to 317 mg/dL or 0.21 to 3.17 g/L
- Pregnancy Trimester Two: 30 to 306 mg/dL or 0.3 to 3.06 g/L
- Pregnancy Trimester Three: 43 to 319 mg/dL or 0.43 to 3.19 g/L