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Immunodeficiency Disorders Blood Test

What is Immunodeficiency Disorders?

Immunodeficiency disorders are conditions where the immune system is weakened or absent, making it difficult for the body to fight off infections, diseases, and cancer. They can be primary (genetic defects present from birth) or secondary (acquired through HIV, chemotherapy, malnutrition, or medications). The Immune Cell Function test is the most important test for diagnosis because it directly evaluates how well your immune cells are working to protect your body.

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What causes immunodeficiency disorders?

Immunodeficiency disorders are caused by genetic defects present from birth (primary immunodeficiencies) or acquired conditions that damage the immune system (secondary immunodeficiencies). Primary causes include mutations in genes controlling immune cell development, such as those affecting B cells, T cells, or complement proteins. Secondary causes include HIV infection, chemotherapy, chronic diseases like diabetes, severe malnutrition, immunosuppressive medications after organ transplants, and certain cancers affecting bone marrow like leukemia and lymphoma.

What is the best test for immunodeficiency disorders?

The Immune Cell Function test is the most important test for immunodeficiency disorders because it directly measures how well your immune cells respond to threats and perform their protective functions. This comprehensive assessment detects impaired immune cell activity that characterizes these conditions. The Lymphocyte Subset Panel 4 (CD4:CD8 Ratio Profile) is also essential as it measures the balance between CD4 helper T cells and CD8 cytotoxic T cells, which becomes abnormal in many immunodeficiencies. Additional tests like Protein Electrophoresis evaluate immunoglobulin levels, and vaccine response tests (Rubella Immune Status, Tetanus Antitoxoid) assess whether your immune system maintains protective antibodies after vaccination.

When should I get tested for immunodeficiency disorders?

You should get tested if you experience frequent infections (more than 4-6 ear infections, 2 serious sinus infections, or 2 pneumonias within a year), infections that are unusually severe or difficult to treat with standard antibiotics, recurrent deep skin or organ abscesses, persistent fungal infections in the mouth or skin after age one, or if you need intravenous antibiotics to clear infections. You should also consider testing if you have a family history of primary immunodeficiency, autoimmune disorders appearing alongside frequent infections, or failure to thrive and grow normally in children.

What are the symptoms of immunodeficiency disorders?
Symptoms of immunodeficiency disorders include recurrent respiratory infections like sinusitis, bronchitis, and pneumonia, frequent ear infections, chronic diarrhea and intestinal infections, persistent yeast infections or thrush, skin infections and abscesses that keep coming back, and slow healing from minor cuts or wounds. You might also experience unexplained weight loss, swollen lymph nodes, enlarged spleen or liver, autoimmune conditions affecting blood cells or organs, and severe reactions to live vaccines. Children with immunodeficiencies often have delayed growth and development.
Who is at risk for immunodeficiency disorders?
People at risk for primary immunodeficiency include those with a family history of these disorders, as many are inherited genetically, and infants showing signs of frequent infections or failure to thrive. Those at risk for secondary immunodeficiency include people with HIV/AIDS, cancer patients receiving chemotherapy or radiation, organ transplant recipients taking immunosuppressive drugs, individuals with chronic diseases like diabetes or kidney disease, people taking long-term corticosteroids, elderly individuals experiencing age-related immune decline, and those with severe malnutrition or protein deficiency. Certain medications for autoimmune conditions also increase risk.
What happens if immunodeficiency disorders are left untreated?
Untreated immunodeficiency disorders lead to recurrent serious infections that can cause permanent organ damage, particularly to the lungs, brain, and digestive system. You face increased risk of developing severe pneumonia, meningitis, sepsis, and life-threatening bloodstream infections. Chronic infections can cause bronchiectasis (permanent lung damage), hearing loss from repeated ear infections, and malabsorption from intestinal damage. Without treatment, people with immunodeficiencies have significantly higher rates of autoimmune disorders, chronic inflammatory conditions, and certain cancers, particularly lymphomas. Some severe forms are fatal in infancy without early intervention like bone marrow transplantation.
Can immunodeficiency disorders be diagnosed with a blood test?
Yes, immunodeficiency disorders can be diagnosed through specialized blood tests that evaluate different components of your immune system. Blood tests measure the number and function of immune cells like lymphocytes, neutrophils, and natural killer cells, assess levels of antibodies (immunoglobulins IgG, IgA, IgM, IgE), evaluate the CD4:CD8 T cell ratio, and measure complement proteins that help antibodies fight infections. Additional blood tests check how well your immune system responds to vaccines by measuring antibody levels to tetanus, rubella, and other diseases. Most people need multiple blood tests combined with your medical history to identify the specific type of immunodeficiency.
How is immunodeficiency disorder treated?
Treatment for immunodeficiency disorders depends on the type and severity. Primary immunodeficiencies involving antibody deficiencies are treated with immunoglobulin replacement therapy (IVIG or subcutaneous IG) given every 3-4 weeks to provide protective antibodies. Severe combined immunodeficiency (SCID) requires bone marrow or stem cell transplantation. Preventive antibiotics or antifungal medications reduce infection risk. Secondary immunodeficiencies are treated by addressing the underlying cause, such as antiretroviral therapy for HIV. All patients should receive prompt treatment for infections, avoid live vaccines, practice careful hygiene, and have regular monitoring of immune function through blood tests.
How can I prevent immunodeficiency disorders?
Primary immunodeficiency disorders cannot be prevented as they are genetic, but genetic counseling helps families understand inheritance risks. You can reduce the risk of secondary immunodeficiency by practicing safe sex to prevent HIV, maintaining a healthy diet rich in protein, vitamins, and minerals, managing chronic diseases like diabetes effectively, and avoiding unnecessary long-term use of steroids or immunosuppressive drugs. If you have an immunodeficiency, prevent complications by staying up to date with killed or inactivated vaccines (but avoiding live vaccines), practicing excellent hand hygiene, avoiding crowds during flu season, treating infections promptly, and having regular check-ups to monitor immune function.
What can I do at home to support my immune system with immunodeficiency?
While home remedies cannot cure immunodeficiency disorders, you can support your immune system by eating a nutrient-dense diet with adequate protein, vitamins C, D, E, zinc, and selenium, getting 7-9 hours of quality sleep nightly, managing stress through meditation or gentle exercise, and staying well-hydrated. Practice meticulous hygiene by washing hands frequently, avoiding sick people, and keeping your environment clean. Avoid raw or undercooked foods that carry infection risk, do not share personal items, and consider wearing masks in crowded public spaces. Always take prescribed medications like immunoglobulin replacement or prophylactic antibiotics exactly as directed, and contact your doctor immediately at the first sign of infection rather than trying to manage it yourself.
How’s this work?
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Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
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Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
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Your testosterone levels are slightly below the optimal range. While this is not necessarily cause for concern, it may contribute to occasional fatigue, reduced motivation, or lower muscle mass over time.

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* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.

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Immune Cell Function
Google reviews 505 reviews
$1,179 $920
What's included
Fast & easy, results by email & SMS
No need to visit a doctor
Private & confidential
No insurance needed
Results explained
No extra fees paid at the lab

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