대학생 잠복결핵 감염의 진단
Diagnosis for Latent Tuberculosis Infection in College Students
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초록
결핵이란 결핵균에 의한 만성 감염질환으로 결핵균이 포함된 비말액을 통해 공기감염을 일으킨다. 대부분의 결핵감염자는 전염력이 없는 잠복감염상태만 유지하나 10%의 감염자 중 절반은 감염 후1∼2년 안에 발병하게 된다. 결핵감염자와 접촉이 있는 학생 74명을 대상으로 결핵 감염자 접촉관련 사전 조사 및 흉부 X-선 검사, TST 검사 및 IGRA 검사를 실시하였다. 1차 TST 검사에서 양성자는 9명, 음성은 65명으로 나타났으며, 음성 판독자는 2차 TST검사를, 양성 판독자는 IGRA 검사를 실시하였다. 1차 TST 양성자 9명중 IGRA 검사에서 3명이 양성자로 나와 잠복 결핵감염 치료를 실시하였다. 1차 TST결과 음성자에 대한 재확인 TST 검사는 1차와차이가 없었다. 결론적으로 잠복결핵감염율은 74명중 3명으로4.05%로 나타났고, 잠복결핵감염자 색출을 위해서 다른 그룹에 대한 조사도 필요하다.
Abstract
Tuberculosis (TB) is caused by a chronic infectious agent known as Mycobacterium tuberculosis. It is transmitted in airborne particles, called droplet nuclei which was generated by cough, sneeze, shout, or sing of persons who have TB disease. Most infections of TB do not have symptoms, well known as latent tuberculosis infection (LTBI). However, about 10% of LTBI progress to active disease a one or two years after infection. To investigate the LTBI rate of college students who were in contacted with TB patients, we performed chest X-ray, tuberculin skin test (TST) and Interferon-gamma release assay (IGRA) to 74 college students. At a results, 65 students were showed negative and 9 students positive results at chest X-ray and 1st TST test. When confirmed the 65 students who were showed negative by 2st TST, the results showed correctly. But, 9 students who were showed positive results on chest X-ray and 1st TST by IGRA, the only 3 students (4.05%) showed positive results. In conclusion, the LTBI rate in this study showed 4.05% (3/74) and we suggest to investigate other students LTBI rate for decreasing tuberculosis.
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