Lab Dept:

Chemistry

Test Name:

IgA (IMMUNOGLOBULIN A)

General Information

Lab Order Codes:

IGA

Synonyms:

Immunoglobulin A

CPT Codes:

82784 – Gammaglobulin; IgA, each

Test Includes:

IgA concentration reported in mg/dL.

Logistics

Test Indications:

Immunoglobulins, also known as humoral antibodies, recognize antigens and initiate mechanisms that destroy antigens. Approximately 10-15% of serum immunoglobin is IgA.

Lab Testing Sections:

Chemistry (all specimens analyzed at Mpls campus)

Phone Numbers:

Minneapolis:

Saint Paul:

612-813-6280

651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

1 - 3 days, test performed Tuesday, Wednesday and Friday

Special Instructions:

N/A

Specimen

Specimen Type:

Blood

Container:

Red top (plain, no gel) tube

Draw Volume:

0.6 mL blood

Processed Volume:

0.2 mL serum

Collection:

Routine venipuncture

Special Processing:

Lab Staff: Centrifuge specimen, remove serum aliquot into a plastic sample cup. Store at refrigerated temperatures for up to 8 days. Centrifuge turbid or particulate samples prior to analysis.

Patient Preparation:

None

Sample Rejection:

Mislabeled or unlabeled specimen, specimens other than serum

Interpretive

Reference Range:

Age:

Range (mg/dL)::

Newborn:

0.0 – 3.6 mg/dL

1 month:

1.3 – 53 mg/dL

2 months:

2.8 – 47 mg/dL

3 months:

4.6 – 46 mg/dL

4 months:

4.4 – 73 mg/dL

5 months:

8.0 – 83 mg/dL

6 months:

8.0 – 67 mg/dL

7 – 9 months:

11 – 89 mg/dL

10 – 11 months:

14 – 105 mg/dL

1 – 2 years:

14 – 157 mg/dL

3 – 5 years:

22 – 200 mg/dL

6 – 9 years:

33 – 234 mg/dL

>9 years:

56 – 451 mg/dL

Critical Values:

N/A

Limitations:

N/A

Methodology:

Nephelometry BN Prospec

References:

Tietz (1999) Textbook of Clinical Chemistry, 3^rd edition, Philadelphia, WB Saunders Co, pp 507-509

N Antisera to Human Immunoglobulins (IgG, IgA, and IgM) Package Insert (June 2008) Siemens Healthcare Diagnostics, Newark, DE