Positive tuberculin skin tests in nursing home residents in Southern Taiwan

Chia-Ming Chang, Nan-Yao Lee, Hsin Chun Lee, Chi Jung Wu, Po-Lin Chen, Ching Chi Lee, Hsin-I Shih, Wen-Chien Ko

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In Taiwan, the tuberculin skin test (TST) is not recommended as a screening test for Mycobacterium tuberculosis (TB) infections. The aim of this study is to determine the prevalence and predictors of positive tuberculin reactivity and its association with TB infections among nursing home residents in Taiwan. A cross-sectional study and review of medical records were conducted at four nursing homes in Tainan City. A one-stage TST was performed by study nurses using two tuberculin units of purified protein derivative (PPD) of the RT23 strain. An induration ≥10. mm at 72. h was considered to be a positive reaction. Chest radiographs, acid-fast stains and mycobacterial cultures of three sputum samples were performed for those with a positive TST result. Of 115 residents (66.5% participation, mean age 73.1 years) who underwent a TST, 26 (22.6%) had a positive reaction. One woman was microbiologically diagnosed to have pulmonary TB. On multivariate analysis, a Bacille Calmette-Guérin (BCG) scar and a history of myocardial infarction were significantly associated with a positive TST. In conclusions, this study shows a considerable rate of positive TST among nursing home residents in southern Taiwan. A BCG scar and a history of myocardial infarction were associated with a positive TST.

Original languageEnglish
JournalArchives of gerontology and geriatrics
Volume51
Issue number3
DOIs
Publication statusPublished - 2010 Nov 1

All Science Journal Classification (ASJC) codes

  • Health(social science)
  • Ageing
  • Gerontology
  • Geriatrics and Gerontology

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