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Baseline test: ≥10 mm is positive (either first or second step); 0 to 9 mm is negative; Serial testing without known exposure: Increase of ≥10 mm is positive; Known exposure: ≥5 mm is positive in patients with baseline of 0 mm; ≥10 mm is positive in patients with negative baseline or previous screening result of >0 mm
[7] [8] If a minor reaction is considered doubtful, the OT test is less accurate and may fail to detect TB, producing a false negative. [2] If all doubtful indications are instead classified as positive, there is no significant difference between the OT test, the PPD tine test, or the Mantoux test.
Chemoprevention or chemoprophylaxis refers to the administration of a medication for the purpose of preventing disease or infection. [1] [2] Antibiotics, for example, may be administered to patients with disorders of immune system function to prevent bacterial infections (particularly opportunistic infection). [3]
A TB blood test for baseline testing does not require two-step testing. If the skin test method is used to test HCP upon hire, then two-step testing should be used. A one-step test is not recommended. [18] The CDC has outlined further specifics on recommended testing for several scenarios. [22] In summary:
The Prevent Cancer Foundation is the only U.S. nonprofit organization focused solely on saving lives across all populations through cancer prevention and early detection. [3] Through research, education, outreach, and advocacy, the Foundation has helped countless people avoid a cancer diagnosis or detect their cancer early enough to be ...
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