24-72 hours after setup at PeaceHealth Laboratories’ reference lab
CPT Code:
82784-90 / 82787-90 x2
Specimen Collection Details
Collection:
One 7.5 mL serum separator tube (SST).
Handling:
Allow to clot, centrifuge and separate serum from cells into a plastic vial. Refrigerate. Provide patient’s age on requisition to allow reporting of age-specific reference ranges.
Stability:
5 days ambient, 14 days refrigerated, or 2 months frozen.
Standard Volume:
2 mL serum
Minimum Volume:
1 mL serum
Transport:
Refrigerated
Comments:
Approximately 10 to 15% of serum immunoglobulin is IgA, which contains 10% carbohydrate, and has a half-life of 6 days. About 10 to 15% of IgA in serum in polymeric, particularly IgA2, which is more resistant to destruction by some pathogenic bacteria than is IgA1. This test Identifies and quantitates IgA subclasses 1 and 2.