Laboratory Services

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)

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)

Additional Information
Minimum Sample Volume

0.5 mL

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