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Immunoglobulin A (IgA)

Immunology

Sample and container requirements

Serum

Minimum volume required

4 ml Blood

Special requirements

none

Patient preparation

None

Sample viability

7 days when stored at 4C or frozen

Turnaround time

3 days

Reference range

Age related reference ranges Cord <0.02 g/L, 0-2 weeks 0.01-0.08 g/L 3-6 months 0.1-0.5g/L, 6-9 months 0.15-0.7g/L, 9-12 months 0.2-0.7g/L 1-2yrs 0.3-1.2 g/L, 2-3yrs 0.3-1.3 g/L 3-6yrs 0.4-2.0g/l, 6-9yrs 0.5-2.4 g/L, 9-12yrs 0.7-2.5 g/L, 12-15yrs 0.8-2.8 g/L, 15-45yrs 0.8-2.8 g/L, >45yrs 0.8-4.0 g/L

Clinical guidance

Quantiation of serum concentration of IgG,IgA and IgM is essential in the diagnosis and management of primary and secondary immunodeficiencies. It is also necessary for monitoring of patients receiving Immunoglubulin replacement therapy.Charecteristic immunoglobulin changes have been descrbed in association with many other diseases and their determination may be helpful in differential diagnosis and disease monitoring https://labtestsonline.org.uk/tests/quantitative-immunoglobulins

Notes

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This information was last updated on 19 August 2026