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Where To Get Quantiferon Gold Test

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Question 4 How Do You Interpret The Quantiferon

Next generation TB testing with QuantiFERON TB Gold Plus

An example of a QFT-Plus report is shown below:

  • Nil or Negative Control Tube

The nil value comes from the negative control tube, which contains no additives it is used to determine if the patient has a preexisting immune response , which could cause a false-positive reading on the test.

For a test to be valid, the nil tube must have a value of 8.0 IU/mL. In the example cited above, the nil value is well within the recommended range of 8.0 IU/mL. The nil tube value is subtracted from the values of the mitogen, TB1, and TB2 tubes for the final result of the respective tubes.

  • Mitogen or Positive Control Tube

The mitogen, or positive control, tube contains a mitogen , which is a nonspecific stimulator of T-cells. It is used to assure that the patients T cells are capable of producing IFN- and also serves as a control for correct blood handling and incubation. The mitogen tube is also used to detect false-negative readings.

For a test to be valid, the mitogen tube must have an IFN- value at least 0.5 IU/mL higher than the value of the nil tube. This indicates that the test is functioning properly.

In the example cited above, the mitogen tube value minus the nil tube value is well above the minimum breakpoint of 0.5 IU/mL.

  • TB1 Antigen

The inside of this tube is coated with M tuberculosisspecific antigens designed to elicit CMI responses from CD4+ T-helper lymphocytes.

  • TB2 Antigen

  • Result Evaluation

Calculation of Positive, Negative, or Indeterminate

What Does It Mean When Your Tb Gold Test Is Positive

Done with 9mos tb treatment. had xray its normal. no tb symptoms ever since. mine is latent tb. how come tb gold test is positive? am i still sick? TB +: Your TB test will always stay positive. It just means you have been exposed to TB- not that you do or do not have the active disease. Read More

Qft Is The Most Clinically Tested And Proven Igra

QuantiFERON-TB Gold is the most clinically tested and proven IGRA available . More than 30 million QFT tests have been sold across 130+ countries, including more than 7 million in 2015. Trust the only blood test for TB infection that offers:

  • The most accurate and reproducible results for TB infection
  • The confidence of more than 1200 clinical and scientific studies
  • Convenient and objective ELISA technology
  • Single visit testing

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Ppd Test Vs Quantiferon

A job candidate needs a tuberculosis test, but which test do they choose PPD test or QuantiFERON?

When choosing a tuberculosis test, a patient must consider many factors, including cost, efficiency and availability. Additionally, medical terms and acronyms associated with tuberculosis may confuse patients. For this reason, we created a Tuberculosis Test Fact Sheet. Below we outline the pros and cons of two most commonly used tuberculosis tests: Purified Protein Derivative Test and QuantiFERONS.

Quantiferon Tb Gold Test Positive Treatment


The quantiFERON TB gold Test positive treatment includes the following steps

  • Special medication prescribed for the period of 6 to 9 months.
  • Use of gamma interferon therapy to monitor the treatment of tuberculosis.
  • The treatment is a long procedure owing to the slow growth of the M. Tuberculosis bacteria and also takes a lot of time to kill the bacteria.
  • Doctors can change the medication in course of the treatment in response to the emergence of drug resistant organisms.

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What Our Service Includes

  • MDAnywhere can help reduce out of pocket lab fees
  • Physician review of your medical information
  • Physician order for a Quantiferon Gold TB test which can be performed at the lab of your choice
  • Physician interpretation of your results
  • Physician reporting the results to you
  • Recommendations based on the results, which may include education and referral

How Do You Confirm Tuberculosis

The Mantoux tuberculin skin test or the TB blood test can be used to test for M. tuberculosis infection. Additional tests are required to confirm TB disease. The Mantoux tuberculin skin test is performed by injecting a small amount of fluid called tuberculin into the skin in the lower part of the arm.

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Quantiferon Tb Gold Plus

The QuantiFERON-TB Gold test measures the immune system response of T cell activation to a possible Mycobacterium tuberculosis infection. Particularly, these immune responsive T- cells become sensitized to the exposure of several high-specificity TB antigens. The QuantiFERON-TB Gold test uses a single mixture of these several antigens. The exposure to these causes the immune system to yield Interferon-? . This existence or absence of this molecule associates to a diagnosis of TB. Additionally, the magnitude of immune response can be determined through a QuantiFERON-TB Gold test, which gives a physician a broad view of the illness and can help in treatment. This test has demonstrated usefulness in younger patients , as well as those with HIV co-morbidity. The QuantiFERON-TB Gold test is effective and efficient. This test boasts 97% specificity, although some studies have found poorer sensitivity with increasing age. Additionally, it has a 24 hour turnaround time, although that can be elongated due to laboratory and provider delay. A shortcoming for this test is that it needs a special syringe, which can disrupt test results and create the need for retests.

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Quantiferon Tb Gold Plus Blood Test

10. What is the Quantiferon Gold Test?

The QuantiFERON TB Gold Blood Test is an in vitro assay to aid in the diagnosis of both latent and active infection with Mycobacterium Tuberculosis.

Also Known As: Interferon-gamma Release Assay for Mycobacterium tuberculosis

Methodology: Whole blood interferon-gamma test measuring responses to CD4+ and CD8+ T cell antigens

Preparation: No fasting required. This test requires a special collection kit that may not be available at all LabCorp locations. Contact your local LabCorp draw site to verify they have the collection kit in stock before visiting the lab.

Test Results: 7-10 days. May take longer based on weather, holiday or lab delays.

Also Known As: Interferon-gamma Release Assay for Mycobacterium tuberculosis

Methodology: Immunoassay

Preparation: No fasting required. This test requires a special collection kit that may not be available at all LabCorp locations. Contact your local LabCorp draw site to verify they have the collection kit in stock before visiting the lab.

Test Results: 4-6 days. May take longer based on weather, holiday or lab delays.

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Advantages Of The Quantiferon Tb Gold Include:

  • Not needing to return for the test results like the TB skin test which requires 2 visits
  • BCG vaccine will not cause a false positive in Quantiferon test as it sometimes does with a TB Skin test
  • Results are usually available in 3-5 business days
  • Can be used in all circumstances in which a TB Skin test is recommended

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Quantiferon Gold Tb Blood Test

The QuantiFERON Gold test, also known as a TB blood test, QuantiFERON test, QFT test and IGRA test, is a blood test that screens for tuberculosis . The QuantiFERON test was created to help identify people who have been exposed to a bacteria that causes tuberculosis known as Mycobacterium tuberculosis, or M. tuberculosis.

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Does Cvs Do Tb Blood Tests

TB testing. MinuteClinic® offers convenient, walk in TB testing for those required to have it for their work, or persons at increased risk of becoming infected. Your MinuteClinic provider will review your medical history, apply the tuberculin skin test and arrange your follow-up visit for assessment of the results.

Quantiferon Gold Test Cost With Insurance


Most of the health insurance policies in the U.S. cover the cost of TB gold blood test. However, the coverage offered by private health insurance companies and national health insurance programs like Medicare and Medicaid varies widely. So we recommend you to check the coverage of your health insurance plan before getting tested for TB.

Our quantiferon TB gold testing providers do not accept any kind of health insurance plan. But, on request, they can provide you with an itemized receipt containing all the details like the name and code of the test, and CPT code that is necessary for insurance reimbursement purposes.

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Quantiferon Tb Gold Test Result Interpretation

A positive response to the QuantiFERON Tb Gold Test indicates towards the infection with the Mycobacterium tuberculosis. Although it does not mean that the person has active TB, rather it simply means that the person has been exposed to the mycobacterium tuberculosis bacterium.

QuantiFERON is unable to distinguish between active tuberculosis disease and latent tuberculosis infection and as such the Quantiferon gold test is used in conjunction with risk assessment, radiography and other medical and diagnostic evaluations.

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What Happens Next

  • Create an MDAnywhere account. Required on your first visit only and can be completed at any time, even in advance
  • Complete your online visit by answering a few medical interview questions and providing your medical history & billing information
  • Remember, you do not need insurance or an appointment to complete your visit
  • Once these two steps are complete AND you have received your treatment request confirmation, a physician will review your entire visit
  • Your treatment plan will be shared with you minutes after the physician reviews your request
  • You will be notified if there is any additional information needed
  • Remember to routinely check for new messages in your patient portal as this will expedite your care
  • You may message your doctor at any time after completing your treatment request
  • Any necessary prescriptions or vaccine orders will be sent electronically to your pharmacy
  • A visit summary with any new/refilled prescriptions or lab/vaccine orders will be sent directly to you for added convenience
  • Any necessary doctor’s notes will be in the messages section of your portal
  • If, at any point, online treatment is not recommended, you will not be charged
  • Rest assured, your private information will be protected, stored securely, and kept confidential

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How Can We Help

The QuantiFeron TB Gold test is a simple blood test that involves giving a small sample of blood in a pathological process. Now, these minor procedures can be done at the comfort of ones home only.

All one has to do is give us a call and our representative healthcare professional will visit him at home at a time and day of his preference. Our representative would collect the blood sample in the most hygienic manner and use standard procedures. Not only that we would also home deliver the quantiFERON TB Gold test report at the persons home.

We offer fully certified and highly reliable lab tests that too at the comfort of a persons home. So if you need to get QuantiFERON TB Gold Test, then just call us to avail the benefits of at home healthcare services.

Does Medicare Cover Quantiferon Gold Test

TB Blood Test: QuantiFERON Gold TB Blood Test Results Overview

Tuberculosis, commonly referred to as TB, is a disease transmitted from one person to another by way of germs that are airborne. TB is typically associated with the lungs, but it can also involve the brain, kidneys, spine and other areas of the body. Without treatment, TB can be fatal. QuantiFERON®-TB Gold In-Tube test is a test your doctor may recommend to determine if you have been infected.

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Tuberculosis If you inhale air contaminated with TB germs, you can get a latent TB infection . This means that the germs have permeated your system but the condition is dormant. Because the germs are not active, you may not feel sick. At this stage, you cannot spread the germs to other people, but you can develop TB disease. Once the disease develops, you are likely to have symptoms and be contagious.

If you have spent time with someone who suffers from TB disease, testing is advisable. You can get tested in one of two ways, either a skin test or a blood test. A positive TB skin test reveals a reaction at the test site, the lower part of your arm. A positive TB blood test registers how your immune system responds to the germs that spawn the disease.

ResourcesRead about tuberculosis testing, treatment, statistics and trends on the Centers for Disease Control and Prevention website at

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What Are The Pros And Cons Of Ppds

Typically, the PPD implant provides the most affordable Tb test option. However, due to the required second visit for reading, the PPD may not be the most cost-effective choice. Also, false positives, one of the drawbacks of PPDs, can happen regularly. Ultimately, these drawbacks can cost you or your agency an extra week of waiting for exams.

What Does The Test Result Mean

If your quantiferon TB gold test results are positive, it indicates that you are infected with TB. As this test does not tell whether the bacterium is active or latent, your physician might order additional tests to identify it.

If your results are negative, it indicates that you are not infected with any form of TB.

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What Is A Quantiferon Tb Gold Test

TB gold is also known as QuantiFERON TB gold. It is a simple blood test done to diagnose the presence of tuberculosis bacterium in the body. QuantiFERON is an Interferon Gamma Release Assay used to detect the TB bacterium. It measures the response of a persons immune system with the help of a certain substance called gamma interferon. This substance is released by the white blood cells in a blood sample when they are exposed to specific TB antigens.

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Question 1 What Is Quantiferon


The QuantiFERON-TB Gold Plus assay is an in vitro diagnostic test that utilizes a peptide cocktail simulating ESAT-6 and CFP-10 proteins to stimulate cells in heparinized whole blood. Detection of interferon- by enzyme-linked immunosorbent assay is used to identify in vitroresponses to these peptide antigens that are associated with Mycobacterium tuberculosis infection. QFT-Plus is an indirect test for M tuberculosis infection and is intended for use in conjunction with risk assessment, radiography, and other medical and diagnostic evaluations. This test does not differentiate between latent and active tuberculosis .1

CDC recommendations state that2,3

  • An interferon gamma release assay may be used in place of a tuberculin skin test in all situations in which CDC recommends TST as an aid in diagnosing adult M tuberculosis infections.

  • An IGRA is preferred for testing persons who have received Bacillus Calmette-Guérin as a vaccine or for cancer therapy.

  • An IGRA or a TST may be used without preference to test recent contacts of persons known or suspected to have active TB with special considerations for follow-up testing. IGRAs offer the possibility of detecting M tuberculosis infection with greater specificity than with a TST. If IGRAs are to be used in contact investigations, negative results obtained prior to 8 weeks after the end of exposure typically should be confirmed by repeat testing 8 to 10 weeks after the end of exposure.

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Quantiferon Tb Blood Test Results

Conservatively, QuantiFERON TB blood test results typically take approximately six business days to be reported. For many people in busy metropolitan areas, TB blood test results can be available in as soon as three business days. A negative QuantiFERON lab report, when accurate, is the best result. It indicates that evidence of tuberculosis exposure cannot be found in the blood specimen. A negative lab test is similar to a negative TB skin test and, in most cases, does not require a chest x-ray for confirmation or other diagnostic studies.

What does a TB blood test result mean? Positive or indeterminate QuantiFERON TB blood test results typically mean that you will need to get a chest x-ray to confirm that you do not have active tuberculosis. Negative QuantiFERON Gold results imply that you do not have latent tuberculosis at the time the blood was drawn.

Who Is At Risk For Tuberculosis

While anyone can become infected with tuberculosis, there are certain groups at higher risk for infection. According to the CDC, the following groups are at a higher risk for TB infection:

  • Healthcare workers
  • People taking certain medications
  • People with a weakened immune system
  • Public health officials working with TB control

As for the development of TB disease, the people at highest risk for the development of the disease are people that have recently been infected with TB bacteria and people with conditions that weaken the immune system.The CDC reports that people in the following groups are at the highest risk for TB disease:

  • People in close contact with a person with infectious TB disease
  • People who have immigrated from areas with high TB rates
  • Children less than 5 years old with a positive TB test
  • Groups such as injection drug users with high rates of TB transmission
  • People who work or reside with people at high risk for TB
  • Babies and young children
  • Other conditions that weaken the immune system

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The Qft Advantage Three Tubes One Clear Result

QFT uses unique blood collection tubes that enable immediate exposure of viable blood lymphocytes to highly specific TB antigens ) and test controls coated on the inner surface of the tubes. Antigen exposure produces a quantifiable immune response to aid in the diagnosis of TB infection.

Nil tube

Low response may indicate inability to generate IFN-

Understanding Results Ofquantiferon Tb Gold

QuantiFERON-TB Gold Plus [Hot Topic]
Reference Range
Above 0.35 IU /ml Positive

*A Reference range is a set of values which helps the healthcare professional to interpret a medical test. It may vary with age, gender, and other factors. Reference ranges may also vary between labs, in value & units depending on instruments used and method of establishment of reference ranges

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