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1 "Interferon-gamma release tests"
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Proposal to Revise the Screening Test for Latent Tuberculosis Infection in Close Contacts at Elementary Schools in Korea
Jong-Myon Bae
J Prev Med Public Health. 2019;52(4):272-275.   Published online May 8, 2019
DOI: https://doi.org/10.3961/jpmph.19.043
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AbstractAbstract AbstractSummary PDFSupplementary Material
The 2018 National Guideline for Tuberculosis Control, which was published by the Korea Centers for Diseases Prevention and Control (KCDC), mandates conducting an epidemiological survey among close contacts of active tuberculosis patients at public institutions such as schools. In the procedure for these surveys, the tuberculin skin test (TST) is mandated as the screening test for latent tuberculosis infection in elementary school students. However, several guidelines recommend using the interferon-gamma releasing assay (IGRA) for contacts aged over 5 years with a Bacillus Calmette–Guérin vaccination history. The main reason for this is that IGRA has a higher specificity and lower false positive rate than TST. In addition, IGRA requires only a single visit to draw blood and the results are available within 24 hours. These advantages could promote cooperation from both parents and students in conducting these surveys. Thus, these findings regarding the benefits of IGRA for surveys of close contacts at elementary schools should be incorporated into the KCDC guideline.
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Korean summary
집단시설에서의 결핵환자 발생시 수행하는 역학조사 지침에는 잠복결핵감염자의 검진을 위해 초등학생에게 투베르쿨린 피부반응검사 (TST)를 시행하도록 되어 있다. 그러나, 6세 이상의 초등학생들은 필수적으로 BCG 예방접종을 받았다는 점과, 역학조사 수행의 협조 등을 고려할 때 TST 대신 인터페론감마 분비검사 (Interferon-gamma releasing assay, IGRA)를 우선 시행하는 것이 보다 더 근거중심적, 가치중심적 으로 타당하다.

JPMPH : Journal of Preventive Medicine and Public Health