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  • Title: [Post-vaccination tuberculin response using PPD derived from BCG].
    Author: Sarinho E, Pontual M, Carvalho MR, da Costa MJ.
    Journal: Bol Oficina Sanit Panam; 1991 Nov; 111(5):402-5. PubMed ID: 1837717.
    Abstract:
    The aim of this study was to compare the biological response obtained with two tuberculin tests--PPD-RT 23 and PPD derived from BCG--among children already vaccinated with the Calmette-Guérin bacillus. Results varied widely, and the differences observed were statistically significant. This shows the need for additional studies to assess the sensitivity, specificity and predictive value of both tests.
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