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PPD conversion |
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PPD conversion Infectious disease The conversion from a state of nonreactivity to reactivity to immune challenge by PPD, presumptive evidence of active TB unless proven otherwise. See Tuberculosis. Cf Anergy. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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