Laboratory Services

Immunoglobulin, IgA

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

Specimen Requirements

SST

Alternate Specimen Type

Red, Li-heparin plasma, K2EDTA

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.

Minimum Sample Volume

1 mL

Pediatric Min. Volume (if applicable)

500 uL

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

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