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What is the difference between all the Tuberculosis (TB) tests?
What is the difference between all the Tuberculosis (TB) tests?
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Written by Trusted Care Team
Updated over a week ago

There are various tests that a facility may require to screen for active Tuberculosis. Each facility has different requirements in test type as well as documentation standards.

  • PPD (Tuberculosis Skin Test): A small injection of PPD (purified protein derivative) will be placed under your skin on your forearm. Results are then read 48-72 hours later in person. If the test is negative, there should be no swelling or induration. If the test is positive, there will be swelling or an induration of 5mm-9mm. Keep in mind that this type of TB test will require two office visits.

  • Quantiferon (Q-gold): A tuberculosis blood test that measures the immune system response of T cell activation to a possible Mycobacterium tuberculosis infection. This requires a blood sample and takes several days to result.

  • TSPOT: Tuberculosis blood test that similarly measures the T cells that have been sensitized by TB infection. It requires a blood sample and typically takes 24-48 hours to result.

โ— Please note that if any results are positive, we will need to send you in for a chest x-ray to rule out active Tuberculosis. This is why we strongly urge you to fulfill your health orders as soon as possible.

Once your Compliance Coordinator sets up your Onboarding Checklist, you'll be able to view the specific requirements. Your Compliance Coordinator will also be reaching out to you through Inbox to send any health orders you need. You'll take those health orders to a clinic to complete the requirements. Usually, if it is a clinic we partner with, you'll receive an invoice and won't have to pay out of pocket. In case you do, you have the opportunity to submit a reimbursement request!

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