Quantiferon Gold: The Best TB Test Available

This test has become the most recommended and accurate method for testing tuberculosis. This cutting-edge technology provides fast results, making it an ideal choice for those who need to be tested quickly and accurately. Quantiferon Gold tests can now easily be found at Discounted Labs in many cities across the U.S., offering convenience without having to visit a doctor's office or clinic. In this blog post, we will discuss what exactly quantiferon gold is, who should get tested with it, how it is administered, any risks associated with its use, as well as where you can find discounted labs that offer this test service so you know all your options before getting tested.

The QuantiFERON-TB Gold Plus (QFT-Plus), also called an interferon gamma release assay (IGRA test), is a diagnostic test that is done in a lab. With a peptide cocktail that looks like the ESAT-6 and CFP-10 proteins, it wakes up cells in whole blood that have been heparinized. There is a test called ELISA that can find interferon gamma (IFN-g) and check how well T cells defend against Mycobacterium tuberculosis (MTB). This helps in vitro responses to these peptide antigens that are linked to Mycobacterium TB infection. When you have an infection with M. tuberculosis, CD4+ T cells are very important for blocking the infection because they release IFN-gamma. A test called QuantiFERON -TB Gold In-Tube (QFT-Gold) could only find IFN-gamma that was released by CD4+ T cells before the QFT-Plus test.

What is Quantiferon Gold?

It is an advanced version of the traditional TB skin test, which requires multiple visits and has been found to be less accurate than Quantiferon Gold. The Quantiferon Gold test can be completed in one visit and provides more reliable results than the skin test. It is also sometimes called the IGRA test. Guidelines recommend performing both IGRA and tuberculin skin tests in immunocompromised patients to detect latent infections and treat it if either test is positive.

Overview of the Test:

When white blood cells touch TB bacteria, they release interferon-gamma. The Quantiferon Gold test measures the amount of this protein in a small amount of blood from the patient's arm. If high levels are detected, it indicates that the person has been exposed to or infected with TB bacteria and is at a greater risk. The entire process takes about two hours, and results are available within 24 hours after testing. The QFT result is indeterminate, meaning that it can be inconclusive. What do we tell the patient, and what do we do? A high background level of interferon-gamma (a negative control that does not work) or no response to the mitogen (a positive control that does not work) can lead to results that are not clear. Repeat QFT or TST placement should depend on patient and provider preference. In San Francisco, repeating the QFT will result in a valid result 65-75% of the time.

Benefits of the Test:

The main benefit of using Quantiferon Gold over other tests for detecting TB infection, such as the TB skin test or chest X-rays, is its accuracy and convenience. These tests might give false positives because of things in the environment or because the person has been vaccinated against TB bacteria before. Quantiferon Gold, on the other hand, measures actual exposure to give more accurate results. This single-visit procedure does not require any additional follow-up visits or further testing if positive results are obtained. Additionally, the BCG vaccine will not cause a false positive in the Quantiferon test, as it sometimes does with the TB skin test. One of the advantages of the test is that it requires a single patient visit to draw a blood sample. Results can be available within 24 hours.

Accuracy of the Test:

Quantiferon Gold is a reliable and accurate test for detecting TB infection. It can be used to help diagnose and monitor active TB infections in people at risk or who have been exposed to the bacteria. Next, we will look at who should get tested with Quantiferon Gold.

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Who Should Get Tested with Quantiferon Gold?

People at Risk for TB Infection:

Those who are considered to be at risk for tuberculosis (TB) infection, such as health care workers and individuals who have recently traveled to countries where TB is common, should get tested with Quantiferon Gold. This includes immunocompromised hosts, as well as those with weakened immune systems due to HIV/AIDS or other medical conditions. It is important that these individuals get tested as soon as possible in order to prevent the spread of the disease.

People with Symptoms of TB Infection:

If you experience any symptoms associated with TB infection, such as a persistent cough, fever, night sweats, weight loss, or chest pain, it is important that you get tested immediately. The earlier the diagnosis of LTBI can be made, the better the chance there is of successful treatment and prevention of further complications from developing.

If you have been exposed to someone known or suspected to have active tuberculosis, it is important that you get tested right away in order to determine if an infection has occurred. This could include close family members or co-workers who may have contracted the disease through contact with an infected individual. Early detection can help reduce your chances of becoming ill and spreading the disease further.

Quantiferon Gold is a reliable and accurate test for TB infection, so anyone who falls into the risk categories should consider getting tested. In the next section, we will discuss how Quantiferon Gold is administered to ensure the accuracy of results.

How is Quantiferon Gold Administered?

Preparation for the Test:

Before undergoing a Quantiferon Gold test, it is important to inform your doctor of any medications you are taking or have taken in the past. Your doctor may advise you to stop taking certain medications prior to the test. Additionally, it is important to avoid eating or drinking anything other than water for at least 8 hours before the procedure.

Procedure for Administering the Test:

During a Quantiferon Gold test, a small sample of blood will be drawn from your arm and sent off to a laboratory for analysis. The entire process usually takes about an hour and can be done at most medical centers without needing an appointment with a doctor.

After having a Quantiferon Gold test, it is recommended that you rest your arm where the needle was inserted for several minutes afterwards in order to reduce swelling and bruising around the area. Additionally, it is advised that you drink plenty of fluids after having this type of lab work done, as dehydration can occur due to fluid loss during testing. Finally, if there are any signs of infection, such as redness or pain around where blood was taken, then contact your healthcare provider immediately, as antibiotics may need to be prescribed in order to prevent further complications from occurring.

Quantiferon Gold is a safe and reliable test that requires minimal preparation and can be administered quickly. However, it's important to understand the potential risks associated with testing in order to make an informed decision about whether or not this test is right for you.

What are the Risks Associated with Quantiferon Gold?

It is an effective way to diagnose TB without the need for a chest X-ray or sputum sample. However, there are some risks associated with taking this test that should be considered before deciding if it’s right for you.

Possible Side Effects and Complications from Testing: Taking a Quantiferon Gold test can cause minor side effects such as soreness at the injection site, fatigue, headaches, nausea, and fever. These symptoms usually resolve within 24 hours of testing and do not require medical attention unless they become severe or persist beyond 24 hours. Additionally, there is always a chance of contracting an infection when having your blood drawn, so both the patient and the technician conducting the test should practice good hygiene to lower this risk.

To reduce the chances of getting a false positive result on your Quantiferon Gold test, it is important to follow all preparation instructions provided by your healthcare provider prior to testing. This includes abstaining from alcohol consumption for 48 hours before testing and avoiding strenuous physical activity for 12 hours before testing, as these activities can affect the accuracy of the results.

Although Quantiferon Gold is a reliable and accurate test, it's important to be aware of the risks associated with testing. Next, let's look at where you can get tested with Quantiferon Gold and what costs may be involved.

Where Can I Get Tested with Quantiferon Gold?

It is an easy and accurate way to diagnose TB without the need for a doctor’s visit. If you are considering getting tested with Quantiferon Gold, it is important to know where you can find an accredited lab near you that offers this service. Discounted Labs sells the most affordable quantiferon gold test in the United States. Click here to buy.

Finding an Accredited Lab Near You:

The best place to start looking for an accredited lab offering Quantiferon Gold testing services is online. Many labs have websites that list their services and provide contact information, so you can call or email them directly if needed. Additionally, Discounted Labs provides affordable testing in most cities in the U.S. without a doctor’s visit, making it easier than ever before to get tested with Quantiferon Gold at a discounted rate.

When searching for labs offering Quantiferon Gold tests, be sure to ask about cost considerations such as insurance coverage and payment plans available through the facility itself or through Discounted Labs if applicable. Depending on your situation, there may be additional costs associated with the test, including travel expenses if necessary and any fees charged by the laboratory performing the test itself. Be sure to ask questions ahead of time so you understand what all costs will be involved in order to make informed decisions regarding your health care needs related to TB screening tests like Quantiferon Gold testing services offered by Discounted Labs in most cities across America today.

FAQs in Relation to Quantiferon Gold

What is QuantiFERON gold test for?

The QuantiFERON Gold test is an initial test used to detect latent tuberculosis infection. It checks how much interferon-gamma, an immune system protein, is released when antigens specific to tuberculosis are present. This allows for accurate detection of TB without the need for skin testing or other more invasive methods. The QuantiFERON Gold test is a safe and reliable way to diagnose latent TB infection and can be done quickly, with results available within 24 hours. It is a cost-effective alternative to traditional TB testing and can be done conveniently without the need for a doctor’s visit. In such situations, the likelihood of M. tuberculosis infection and disease progression should be reassessed, and the initial test results should be confirmed. Repeat testing (using a newly collected specimen), with either the initial test or a different test, may be considered on a case-by-case basis.

What does it mean if QuantiFERON is positive?

If someone gets a positive QuantiFERON result, it means they have been exposed to or are currently infected with Mycobacterium tuberculosis (TB exposure). This is the bacteria that causes tuberculosis (TB). TB is a contagious and potentially serious bacterial infection that affects the lungs. It can be spread through close contact with an infected person and can cause symptoms such as coughing, fever, night sweats, weight loss, and chest pain. Treatment usually involves antibiotics taken over several months to prevent further spread of the disease.

What happens if TB gold test is positive?

If a TB Gold test is positive, it indicates that the person has been infected with Mycobacterium tuberculosis (M. tuberculosis) and may have active TB disease. This bacterium can cause serious illnesses such as tuberculosis (TB) and other diseases. In patients at high risk for M. tuberculosis infection, a second test should be considered in accordance with the 2017 ATS/IDSA/CDC Clinical Practice Guidelines for Diagnosis of Tuberculosis in Adults and Children. If a TB Gold test is positive, it is important to seek medical attention immediately in order to receive an accurate diagnosis and an appropriate treatment plan for active TB disease. Treatment for active TB usually involves taking several antibiotics for at least six months or longer, depending on the severity of the infection. In order to stop the disease from spreading, it's also crucial to take all medications exactly as your doctor has instructed.

What is the difference between a TB test and QuantiFERON?

A TB test, also known as a tuberculin skin test, is a skin test used to detect the presence of Mycobacterium tuberculosis, the bacteria that causes tuberculosis. It involves injecting a small amount of fluid containing tuberculin, the substance used in the tuberculin skin test, into the skin and then observing for any reaction over 48–72 hours. A positive result indicates exposure to TB but is not necessarily an active infection.

The QuantiFERON test looks for an active TB infection in the blood by measuring the amount of proteins that are released when M. tuberculosis antigens are present. This type of testing can provide more accurate results than traditional skin tests and may be recommended if there are concerns about potential false positives or negatives with the TB skin test.


Quantiferon Gold is a highly accurate and recommended TB test that can be administered without a doctor's visit. It is an easy, safe, and affordable way to check for tuberculosis infection. Discounted Labs offers this test in most cities across the U.S., so if you are looking for a reliable TB test, Quantiferon Gold may be the right choice for you.

Are you looking for an affordable way to get tested for QuantiFERON Gold without a doctor’s visit? Look no further than DiscountedLabs.com! Our team of experts will provide you with the best possible prices on this important lab test and make sure that your results are accurate, reliable, and cost-effective. Don't wait any longer; take advantage of our discounted labs today!


  1. FAQs for health professionals: QuantiFERON®-TB Gold Plus. QuantiFERON. Published July 2017. Accessed March 2, 2021. http://www.quantiferon.com/wp-content/uploads/2017/10/PROM-11178-001_1107769_BRO-QFT-TB-Gold-Plus-FAQ-HCPs-0717-US.pdf
  2. Lewinsohn DM, Leonard MK, LoBue PA, et al. Official American Thoracic Society/Infectious Diseases Society of America/Centers for Disease Control and Prevention clinical practice guidelines: diagnosis of tuberculosis in adults and children. Clin Infect Dis. 2017;64(2):e1-e33. doi:10.1093/cid/ciw694
  3. Mazurek GH, Jereb J, Vernon A, et al. Updated guidelines for using interferon gamma release assays to detect Mycobacterium tuberculosis infection—United States, 2010. MMWR Recomm Rep. 2010;59(RR05):1-25.
  4. QuantiFERON-TB Gold Plus (QFT-Plus). Package insert. QuantiFERON. Published August 2017. Accessed March 2, 2021. http://www.quantiferon.com/wp-content/uploads/2017/10/QFT-Plus-ELISA-IFU-L1095849-R02.pdf