IgA subclass 2

ChemistryAlso known as: Iga2Also known as: Immunoglobulin A2mg/dL

Measures the level of IgA subclass 2, an antibody important for mucosal immunity.

Normal Range
5 – 64 mg/dL
mg/dL
Abnormal Levels
Consult your provider
Specimen Type
Blood

Why This Biomarker Matters

Low IgA subclass 2 may indicate immune dysfunction and increased infection risk at mucous membranes. This helps evaluate recurrent infections and guides immune system assessment.

Understanding Your Results

Normal Range

5 – 64 mg/dL

Overview

IgA is an antibody (immunoglobulin) that plays a key role in immune defense, especially at mucous membranes like those in the gut and respiratory tract. IgA subclass 2 is one of two subtypes of IgA (the other being subclass 1). Low IgA subclass 2 levels can indicate immune system dysfunction or certain infections. This test is sometimes used to evaluate recurrent infections, gastrointestinal problems, or immunodeficiency disorders. IgA subclass deficiency may affect your ability to fight infections at mucosal surfaces, though the clinical significance can vary.

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

6939-3Primary
IgA subclass 2 [Mass/volume] in Serum
mg/dL
17006-8
IgA subclass 2 [Mass/volume] in Cerebral spinal fluid
mg/dL

Available Lab Tests

Order tests that measure this biomarker

IgA Subclasses

$128.59