Immunoglobulin A
Immunglobulin A (IgA) levels decrease in primary and secondary immunodeficiency syndromes. Increased values occur e.g. in severe infections and autoimmune diseases.
Reference Ranges
| Adults | ||
|---|---|---|
| 70 – 400 mg/dL | 4.38 – 25 µmol/L | |
| Children | ||
|---|---|---|
| < 1 month | 7 – 94 mg/dL | 0.44 – 5.88 µmol/L |
| 1 – 12 months | 10 – 131 mg/dL | 0.63 – 8.19 µmol/L |
| 1 – 3 years | 19 – 220 mg/dL | 1.19 – 13.8 µmol/L |
| 4 – 5 years | 48 – 345 mg/dL | 3 – 21.6 µmol/L |
| 6 – 7 years | 41 – 297 mg/dL | 2.56 – 18.6 µmol/L |
| 8 – 10 years | 51 – 297 mg/dL | 3.19 – 18.6 µmol/L |
| 11 – 13 years | 44 – 395 mg/dL | 2.75 – 24.7 µmol/L |
Each laboratory should check if the reference ranges are transferable to its own patient population and determine own reference ranges if necessary. For diagnostic purposes, the results should always be assessed with the patient’s medical history, clinical examinations and other findings.
For information on clinical relevance, please refer to the package insert.