Tuberculin PPD RT23: has it lost some of its potency?

Int J Tuberc Lung Dis. 1998 Oct;2(10):857-60.


PPD RT23 is a tuberculin that is used worldwide. Korea has been using 1TU RT23 for its nationwide tuberculosis prevalence surveys at five-yearly intervals since 1965, and found a drop in its potency after the 1975 survey. This finding draws attention to the interpretation of tuberculin survey data observed with RT23 at different time periods.

MeSH terms

  • Adolescent
  • Adult
  • Age Distribution
  • Child
  • Child, Preschool
  • Data Collection
  • Female
  • Humans
  • Korea / epidemiology
  • Male
  • Prevalence
  • Sensitivity and Specificity
  • Tuberculin Test / standards*
  • Tuberculosis / diagnosis*
  • Tuberculosis / epidemiology