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HelpTest Code IGA Immunoglobulin A
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL / 6.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 7 days |
| Refrigerate | 7 days |
| Frozen | 6 months |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Gross Lipaemia | Alert/Reject |
| Others | Not applicable |
Methodology
Immunoturbidimetry
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Age | Male | Female |
|---|---|---|
| 0 – < 1 yr | 0.0 – 0.3 g/L | |
| 1 – 2 yrs | 0.0 – 0.9 g/L | |
| 3 – 5 yrs | 0.3 – 1.5 g/L | |
| 6 – 13 yrs | 0.5 – 2.2 g/L | |
| 14 – 18 yrs | 0.5 – 2.9 g/L | |
| 19 – 59 yrs | 0.6 – 4.8 g/L | 0.6 – 4.2 g/L |
| ≥ 60 yrs | 1.0 – 6.5 g/L | 0.7 – 5.2 g/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation of humoral immunity. Increased level is seen in IgA myeloma, liver chirrhosis and chronic infection.
Decreased level is seen in malabsorption, hereditary telangectasia, hereditary and acquired immunodeficiency states.
Update
Last updated 11/03/2025
Alias
Gamma-Globulins, Quantitative
IgA single test
Immune Competence
LOINC Code Information
2458-8
Service Code
31612
Laboratory Code
LAB3006