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Syed O. Ali, MD

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Atypical Tuberculin Skin Test Responses

September 01, 2007

Twenty-four hours after receiving a standard 5-unit purified protein derivative of tuberculin (PPD) skin test, a young African American presented with a slightly pink, raised, firm plaque at the site of the injection (A). His previous PPD test results were negative. He denied any constitutional symptoms and rashes. He was otherwise healthy, was not taking any medication, and was HIV-negative.