Tuberculin Skin Test Conversion among Health Care Workers in Bamrasnaradura Infectious Diseases Institute, Thailand
Keywords:
Tuberculin skin test, Health Care Workers, Bamrasnaradura Infectious Diseases InstituteAbstract
This study was a routine job to research (Routine to Research: R2R). In Bamrasnaradura InfectiousDisease Institute, Tuberculin skin test (TST) was performed in health care workers (HCW) every year. Thisstudy was a retrospective study aimimg to determine the incidence of the TST conversion by measuringinduration which was 10 mm or more during 2008-2010 .Two hundred and twenty six persons were tested, 37 persons were excluded from the study due to initial TST positive result, the remaining 189 personnel withTST negative were enrolled into the study and subsequent TST were performed in the following year. Theincidence of the TST conversion is 30 % (57 HCW out of 189 HCW). Factors that affected the test resultswere statistically analysed using Relative risk, and multiple logistic regression. It was revealed that TSTconversion was correlated with BCG scar. Another factor that might affect the results of the TST was ahistory of tuberculosis in the family. However, due to small number of enrolled samples statistically significant could not demonstrate (p = 0.06).
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