Immune & Allergy - Bloody Good
Allergy

Immunoglobulin A (IgA) Test

The Immunoglobulin A (IgA) test measures antibodies that protect mucous membranes in the respiratory and digestive tracts. Abnormal IgA levels can indicate immune deficiencies, chronic infections, or autoimmune conditions such as coeliac disease.

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Immunoglobulin A (IgA) Test

Experiencing recurrent infections, digestive problems, or suspected immune deficiency and want to assess your mucosal immunity and immune system function?

Overview

The Immunoglobulin A (IgA) test measures your body's security guard for all the places where the outside world meets your inside – think of it as checking on the bouncer that protects your mouth, nose, lungs, and digestive system from unwanted invaders. IgA is like your body's first responder, stationed at these entry points to catch harmful bacteria, viruses, and other troublemakers before they can cause infections or slip deeper into your system.

When your IgA levels are too low (which happens to about 1 in 500 people), it's like having a security system with gaps – you might find yourself getting frequent respiratory infections, digestive issues, or seeming to catch every bug that goes around despite feeling otherwise healthy. This test is particularly helpful if you're dealing with recurring sinus infections, ongoing stomach problems, or if you just can't seem to shake off illnesses as easily as others, as it can reveal whether your body's natural defense system needs some support.

Reviewed by Dr. Vu Tran
Bloody Good’s Chief Medical Officer

Symptoms

You may benefit from this test if you experience:
Frequent infections (more than 4 colds per year) Recurrent skin infections Frequent sinus infections Chronic diarrhea (more than 3 loose stools daily) Annual physical exam

Purpose

Essential for individuals with recurrent infections, suspected immune deficiencies, chronic digestive issues, or anyone needing comprehensive immune system assessment.

How to prepare

No special preparation required. Inform healthcare provider of recent infections, medications affecting immune function, and any immune-related conditions that might affect results.

Understanding results

Results show IgA levels compared to normal ranges. Low levels may indicate immune deficiency requiring further evaluation, while elevated levels might suggest immune activation or certain diseases.

After the test

Address abnormal IgA levels through comprehensive immune evaluation, appropriate treatments for underlying conditions, immune support strategies, and regular monitoring. Work with immunologists for specialized care.

Frequently Asked Questions

  • Low IgA (selective IgA deficiency) increases susceptibility to mucosal infections, may be associated with autoimmune conditions and allergies, and can affect the accuracy of certain antibody tests.
  • IgA deficiency can be genetic (primary immunodeficiency) or acquired due to medications, infections, autoimmune diseases, or other conditions affecting immune function.
  • Symptoms may include recurrent respiratory infections, chronic diarrhea, increased allergies, autoimmune conditions, and frequent illness, though some people have no symptoms.
  • While there's no cure for primary IgA deficiency, management includes prompt treatment of infections, avoiding live vaccines, and monitoring for associated conditions.
  • Elevated IgA may indicate chronic infection, autoimmune disease, liver disease, or certain cancers, requiring further evaluation to determine the underlying cause.
  • IgA deficiency can cause false-negative results on IgA-based tests like tissue transglutaminase antibodies for celiac disease, requiring alternative testing methods.
Immunoglobulin A (IgA) Test

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How it works

What to expect

We want you to feel bloody good—inside and out. Regular testing isn’t just about checking your current health; it helps you spot abnormal values you might not know about.

1

Book your referral

Choose the testing that suits your goals. After ordering, you will receive your referral by email.

2

Collect your sample

Easy sample collection at one of our 4000+ partner collection centres throughout Australia. Find nearest

3
Receive your results

Receive your results

View your lab results and receive a personalised review from the secure Bloody Good platform.

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