Test Directory

Immunoglobulin, IgA

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Updated Test Information:

Test Description
Immunoglobulin, IgA
Synonym(s)
IgA Immunoglobulin
Test ID
IGA
General Information
IgA accounts for 13 % of the plasma immunoglobulins and serves to protect the skin and mucosa against microorganisms. It is capable of binding toxins, and in combination with lysozyme develops anti-bacterial and antiviral activity. IgA is the predominant immunoglobulin in bodily secretions such as colostrum, saliva and sweat. Secretory IgA provides defense against local infections and is important in binding food antigens in the gut.
Specimen Type
Serum
Alternate Specimen Type
Red, Li-heparin plasma, K2EDTA
Specimen Requirements
SST
Specimen Collection / Processing Instructions
SST - Separate serum or plasma from cells within 45 minutes of collection. If a red-top tube or green-top tube is used, transfer separated serum or plasma to a plastic transport tube.
Additional Processing Details
Separate serum or plasma from cells within 45 minutes of collection. If a red-top tube or green-top tube is used, transfer separated serum or plasma to a plastic transport tube.
Stability
8 months at 15‑25 °C
8 months at 2‑8 °C
8 months at (-15)‑(-25) °C
Limitations
This test may not provide accurate results in patients with monoclonal gammopathy, due to individual sample characteristics which can be assessed by electrophoresis.
Methodology
Immunoturbidimetric
Estimated TAT
0-2 days
Testing Schedule
Monday-Saturday
CPT Code(s)
82784
Minimum Sample Volume
1 mL
Pediatric Min. Volume (if applicable)
500 uL
Reference Range
0‑1 year 0.00‑83 mg/dL
1‑<4 years 20‑100 mg/dL
4‑<7 years 27‑195 mg/dL
7‑<10 years 34‑305 mg/dL
10‑<12 years 53‑204 mg/dL
12‑<14 years 58‑358 mg/dL
14‑<16 years 47‑249 mg/dL
16‑<19 years 61‑348 mg/dL
Adults 70‑400 mg/dL
Performing Lab
Incyte Diagnostics
LOINC Code(s)
2458-8