IgA Deficiency
What is IgA Deficiency?
IgA deficiency is a condition where your body does not make enough Immunoglobulin A. IgA is a type of antibody that protects the mucous membranes in your body. These membranes line your nose, throat, lungs, and digestive tract.
When you have low IgA levels, your first line of immune defense is weaker. This can make you more prone to infections in your respiratory and digestive systems. Many people with IgA deficiency have no symptoms at all. Others may experience recurring infections or digestive problems.
IgA deficiency is the most common primary immunodeficiency. It affects about 1 in 500 people. Most people live normal lives with this condition. Understanding your IgA levels helps you and your doctor make better decisions about your health.
Symptoms
- Frequent respiratory infections like sinus infections, bronchitis, or pneumonia
- Recurring ear infections
- Chronic diarrhea or other digestive problems
- Food allergies or sensitivities
- Asthma or allergies
- Autoimmune conditions like celiac disease or rheumatoid arthritis
- Recurring urinary tract infections
Many people with IgA deficiency have no symptoms at all. The condition is often discovered during testing for another health concern. Some people only experience mild symptoms that they may not connect to an immune problem.
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Causes and risk factors
IgA deficiency is usually genetic, meaning you are born with it. The exact genetic cause is not always clear. Sometimes it runs in families. Other times it appears without any family history. The condition develops when your immune system fails to produce enough IgA antibodies.
Certain medications can temporarily lower IgA levels. These include some drugs used to treat seizures and malaria. Rarely, IgA deficiency can develop later in life due to infections or other medical conditions. Most cases are present from birth and last throughout life.
How it's diagnosed
IgA deficiency is diagnosed through blood tests that measure your immunoglobulin levels. Doctors look for very low or absent IgA antibodies in your blood. A diagnosis is typically made when IgA levels fall below 7 milligrams per deciliter in adults.
Rite Aid offers testing for conditions related to IgA deficiency. Our tests include Gliadin Deamidated Ab IgA and Tissue Transglutaminase tTG Antibody IgA. These tests help identify immune responses and gluten-related disorders that can occur with IgA deficiency. If you have symptoms or a family history of immune problems, testing can provide important answers.
Treatment options
- Prompt treatment of infections with antibiotics when needed
- Avoiding live vaccines in some cases, as recommended by your doctor
- Managing any associated autoimmune conditions
- Eating a nutrient-rich diet to support overall immune function
- Avoiding known allergens or food triggers
- Regular monitoring with your healthcare provider
- Preventive antibiotics in cases of frequent infections
- Screening for celiac disease and other autoimmune conditions
Most people with IgA deficiency do not need specific treatment. The focus is on managing symptoms and preventing complications. If you experience frequent infections, work with your doctor to develop a prevention plan.
Need testing for IgA Deficiency? Add it to your panel.
- Simple blood draw at your nearest lab
- Results in days, not weeks
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Frequently asked questions
IgA deficiency is a condition where your body does not produce enough Immunoglobulin A antibodies. These antibodies protect the mucous membranes in your respiratory and digestive systems. It is the most common primary immune deficiency, affecting about 1 in 500 people.
Many people with IgA deficiency have no symptoms at all. When symptoms do occur, they often include frequent respiratory infections, recurring ear infections, and digestive problems. Some people develop autoimmune conditions or allergies. The severity of symptoms varies widely from person to person.
IgA deficiency is diagnosed through a blood test that measures your immunoglobulin levels. Doctors look for IgA levels below 7 milligrams per deciliter in adults. The test is usually ordered when someone has frequent infections or during evaluation for autoimmune conditions.
Most people with IgA deficiency live normal, healthy lives. The condition can increase your risk of infections and autoimmune disorders. Serious complications are rare but can occur. Regular monitoring and prompt treatment of infections help prevent most problems.
There is no cure for IgA deficiency. The condition is usually lifelong. Treatment focuses on managing symptoms and preventing complications. Most people with IgA deficiency do not need any specific treatment beyond addressing infections when they occur.
Standard celiac disease tests measure IgA antibodies to gluten proteins. If you have IgA deficiency, these tests may give false negative results even if you have celiac disease. Your doctor can use IgG-based tests instead to screen for celiac disease in people with low IgA levels.
There are no specific dietary restrictions for IgA deficiency alone. Eating a balanced diet rich in fruits, vegetables, lean proteins, and whole grains supports your immune system. If you have celiac disease or food allergies along with IgA deficiency, you will need to avoid those specific triggers.
Yes, IgA deficiency can cause digestive problems in some people. IgA antibodies normally protect your intestinal lining. Without enough IgA, you may be more prone to infections, inflammation, and food sensitivities. People with IgA deficiency have higher rates of celiac disease and inflammatory bowel conditions.
Most vaccines are safe for people with IgA deficiency. Your doctor may recommend avoiding live vaccines in some cases. Always tell your healthcare provider about your IgA deficiency before receiving any vaccination. Most routine immunizations are still recommended and important for preventing infections.
Testing frequency depends on your symptoms and overall health. If you have no symptoms, annual checkups with your doctor may be enough. People with frequent infections or autoimmune conditions may need more regular monitoring. Your doctor can recommend a testing schedule based on your individual needs.