Skin Testing

TB skin testing with the 5-TU strength of Tubersol PPD, also known as the Mantoux

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test, is the preferred method for skin testing. ' ' The product is injected into the skin (not subcutaneously) with a fine (27-gauge) needle and produces a small, raised, blanched wheal to be read by an experienced professional in 48 to 72 hours. Criteria

for interpretation are listed in Table 75-1.1,2,0,19,22 The CDC does not recommend

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the routine use of anergy panels. ' The "booster effect" occurs in patients who do not respond to an initial skin test but show a positive reaction if retested about a week later.19,28

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