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Delaware

TB Blood Test in Delaware

The TB Gold blood test, also called QuantiFERON, uses a blood sample to check for tuberculosis infection by measuring the immune response to TB proteins. It can detect latent or active infection without a skin test.

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Typical turnaround
1-3 business days
Starting price
From $199
Results
Confidential, online

Quick answer

The TB Gold blood test, commonly known as QuantiFERON, checks whether a person has been infected with the bacteria that cause tuberculosis. It works by measuring the immune system's response to specific TB proteins in a blood sample. Unlike a skin test, it needs only one visit and no second reading. Results help clinicians evaluate latent or active TB infection.

What this test measures

Tuberculosis is caused by Mycobacterium tuberculosis, a bacterium that usually affects the lungs and can remain inactive for years. The QuantiFERON assay measures interferon-gamma released by white blood cells when they encounter TB-specific antigens. This immune response indicates prior exposure to the bacterium. Clinicians use the result alongside symptoms, imaging, and other tests when evaluating possible latent or active infection.

The sample is whole blood collected into specialized tubes that contain TB antigens, a negative control, and a positive control. After incubation, the laboratory measures interferon-gamma in the plasma. The assay targets antigens such as ESAT-6 and CFP-10, which are absent from most BCG vaccine strains and from many non-tuberculous mycobacteria, which improves specificity compared with older skin testing.

The test is often requested for people who have had close contact with someone with active TB, for healthcare and congregate-setting workers, for people starting certain biologic treatments, and for those born or living in regions where TB is more common. It is a screening tool and does not by itself confirm active disease, so a qualified healthcare provider interprets it with the full clinical picture.

TB Blood Test in Delaware cities

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Frequently Asked Questions

Where can I get a tb blood test in Delaware?

Delaware has certified laboratories and independent diagnostic centers that offer this panel. Direct-access ordering lets you select a location that fits your schedule.

How much does a tb blood test cost in Delaware?

Pricing varies by provider and location. Check the price shown at checkout, and contact the testing partner for a written estimate if needed.

Is at-home collection available in Delaware?

For select panels, at-home kits can be shipped to Delaware, collected at home, and mailed back for analysis.

How long do results take in Delaware?

Most results are reported within 1-3 business days after collection.

Ready to get tested?

Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.

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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.

Medical disclaimer. The information on LabOrdering.com is educational only and is not medical advice, diagnosis, or treatment. Reference ranges and clinical guidance vary between laboratories. Always consult a qualified healthcare provider about your own results and care.