| Literature DB >> 9783535 |
S J Kim1, Y P Hong, G H Bai, E K Lee, W J Lew.
Abstract
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.Entities:
Mesh：
Year: 1998 PMID： 9783535
Source DB: PubMed Journal: Int J Tuberc Lung Dis ISSN： 1027-3719 Impact factor: 2.373