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Tuberculin Skin Test and Boosted Reactions among Newly Employed Healthcare Workers: An Observational Study

Title
 Tuberculin Skin Test and Boosted Reactions among Newly Employed Healthcare Workers: An Observational Study
Authors
 Song Yee Kim; Moo Suk Park; Young Ae Kang; Kyungwon Lee; Hyun Sook Kim; Dong eun Yong; Joon Chang; Se Kyu Kim; Young Sam Kim
Issue Date
2013
Journal Title
 PLoS One
ISSN
 1932-6203
Citation
 PLoS One, Vol.8(5) : e64563, 2013
Abstract
OBJECTIVE: To evaluate the prevalence of and factors associated with latent tuberculosis infection (LTBI) based on the tuberculin skin test (TST) and to estimate the boosted reaction rate among newly employed healthcare workers (HCWs). DESIGN: Newly employed HCWs between January 2010 and July 2012 at Severance Hospital in South Korea were enrolled in this study. A one-step TST was conducted before October 2011, and a two-step TST after October 2011. RESULTS: Of 2132 participants, 778 (36.5%) had positive TST results. Being older (odds ratio [OR] 1.10, 95% confidence interval [CI] 1.06-1.13, P<0.001), male (OR 1.78, 95% CI 1.21-2.62, P = 0.003), rejoining the hospital workforce (OR 1.58, 95% CI 1.04-2.40, P = 0.032), and having a previous history of tuberculosis (TB) (OR 18.21, 95% CI 2.15-154.10, P = 0.008) during the one-step period, and being older (OR 1.15, 95% CI 1.10-1.21, P<0.001) during the two-step period were significantly associated with a positive TST. A two-step TST was performed in 556 HCWs, and a boosted reaction was observed in 79 (14.2%). The induration size on the first TST (5-9-mm group) was the only factor associated with a boosted reaction on the second TST. CONCLUSIONS: The prevalence of LTBI based on the TST among newly employed HCWs was high. The boosted reaction rate on two-step TST was not low; therefore, the use of two-step TST may be necessary for regular monitoring in countries with an intermediate TB burden and a high rate of Bacillus Calmette-Guérin vaccination.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/87019
DOI
10.1371/journal.pone.0064563
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Internal Medicine
1. 연구논문 > 1. College of Medicine > Dept. of Laboratory Medicine
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