Diseases of Concern Tuberculosis

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IGRAs Test
Interferon-Gamma Release Assays (IGRAs)
  • This is a newer test that tests whole blood
  • There are 2 types available in the US
    1. QuantiFERON" TB Gold Test (QFT-GIT)
    2. T-SPOT".TB test (T-Spot)
  • These tests look for the bodies immune response from TB
  • Possible results
    • QFT-GIT
      • Positive, negative, indeterminate
    • T-Spot
      • Positive, negative, indeterminate, boardline
  • Test is expensive and can be difficult to run
  • A positive is that the patient has one visit and it is a blood test with results within 24 hours
  • As with a skin test, this test is used in conjunction with other tests and clinical assessment [9]
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