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IgA Subclasses, Serum

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Updated Test Information:

Test Description
IgA Subclasses, Serum
Test ID
IGAS
General Information

Useful for:



  • Investigation of immune deficiency due to IgA2 deficiency

  • Evaluating patients with anaphylactic transfusion reactions
Specimen Type

Serum
Specimen Requirements

  • Preferred: Red Top

  • Acceptable: Serum Gel (SST)
Minimum Sample Volume

0.5 mL
Stability

  • Refrigerated (preferred): 7 days

  • Ambient: 7 days

  • Frozen: 7 days
Unacceptable Specimen Conditions

Gross lipemia
Limitations

Quantitation of specific proteins by nephelometric means may not be possible in lipemic sera due to the extreme light scattering properties of the specimen. Turbidity and particles in the specimen may result in extraneous light scattering signals, resulting in variable specimen analysis
Methodology

Nephelometry
Estimated TAT

1-2 days
Testing Schedule

Monday-Friday
Test Includes

  • IgA

  • IgA1

  • IgA2
Retention

14 days
CPT Code(s)

82784; 82787 (x2)
Reference Range
Age IgA (mg/dL) IgA1 (mg/dL) IgA2 (mg/dL)
0.0 - 4.9 months  7 - 37 10 - 34 0.4 - 5.5
5.0 - 8.9 months 16 - 50 14 - 41 1.5 - 6.2
9.0 - 14.9 months 27 - 66 20 - 50 2.8 - 7.0
15.0 - 23.9 months 36 - 79 24 - 58 3.9 - 7.7
2.0 - 3.9 years 27 - 246 16 - 162 1.3 - 31.1
4.0 - 6.9 years 29 - 256 17 - 187 1.1 - 39.1
7.0 - 9.9 years 34 - 274 21 - 221 1.4 - 48.0
10.0 - 12.9 years 42 - 295 27 - 250 2.6 - 53.4
13.0 - 15.9 years 52 - 319 36 - 275 4.7 - 55.1
16.0 - 17.9 years 60 - 337 44 - 289 6.6 - 54.3
≥ 18 years 61 - 356 50 - 314 9.7 - 156.0

 

 
Performing Lab

Mayo
LOINC Code(s)

2458-8, 6886-6, 6939-3
Additional Information