A TB blood test in Mesa, AZ, also called QuantiFERON-TB Gold Plus or an interferon-gamma release assay (IGRA), measures whether your white blood cells release interferon-gamma when exposed to TB proteins, showing if you've been infected with TB bacteria.
How It Works
Walk In
Quick Blood Draw
Results in 48-72 Hours Sent To You
What Is a TB Blood Test?
A TB blood test is also called an IGRA (interferon-gamma release assay).
We use QuantiFERON-TB Gold Plus, the most widely used brand. The other brand, T-SPOT.TB, works the same way, and most employers and schools accept either.
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A single blood draw from your arm, done in a few minutes
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The lab measures how your immune cells react to TB proteins
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One visit. No coming back in 48 to 72 hours like the skin test
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Not affected by the BCG vaccine, unlike the skin test
TB Blood Test or Skin Test: Which Is Better?
The blood test is better if:
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You've had the BCG vaccine. The CDC says the blood test is preferred, since BCG can cause a false positive on a skin test
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You can't make it back for a skin test reading
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You need to replace a 2-step test, since a blood test doesn't need a second step
The skin test is better if: you want the lowest price and can return for your reading.
What Do TB Blood Test Results Mean?
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Negative: no immune response to TB bacteria was found. You're cleared
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Positive: your body has reacted to TB bacteria, often from an old, inactive infection. The next step is a chest X-ray, and we'll refer you to the health department
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Indeterminate: the result wasn't clear, and the test may need to be repeated
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A positive result doesn't mean you have active TB. Many employers and schools can still clear you once active TB is ruled out.
Why Mesa Trusts Quick Test Health Services®
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Affordable pricing
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One visit, no reading to come back for
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Results sent straight to your patient portal
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Pair it with titers or a physical in the same visit
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Locally owned in East Mesa
Get a TB Blood Test Near You in Mesa
Walk into Quick Test, our lab off US-60 at East University Drive and Power Road, with no appointment or online order needed. 7165 E. University Dr. #155, Mesa, AZ 85207
Serving: Mesa · Gilbert · Queen Creek · Apache Junction · San Tan Valley · Chandler · Tempe
Common Questions
Is there a TB titer test? No. A titer checks for immunity from a vaccine, and there's no titer for TB. If your school or job asks for a "TB titer," they usually mean a TB blood test (QuantiFERON) or skin test. We also offer real titers for MMR, varicella, and hepatitis B.
Is a PPD the same as a TB blood test? No. A PPD is the TB skin test, placed on your arm and read 48 to 72 hours later. The QuantiFERON blood test is a single blood draw with no return visit.
Do I need to fast for a TB blood test? No. You can eat and drink normally before your blood draw