• 보건세계
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• 제63권1호
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• pp.5-7
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• 2014

우리나라 인구의 약 1/3이 결핵에 감염된 것으로 알려져 있다. 많은 사람들이 이 대목에서 깜짝 놀란다. '국민 3명 중 1명이 감염자라고?' 감염이 곧 '결핵'을 의미하는 것은 아니다. 하지만 감염이 된 사람은 언제든 결핵으로 진전될 가능성을 안고 있는, 잠재적 결핵환자이다. 이 페이지에서는 내 몸에 결핵균이 들어왔는지 여부를 확인 할 수 있는 TST, 즉 투베르쿨린 피부검사에 대해 알아보기로 한다.

• 한국해양학회지:바다
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• 제8권4호
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• pp.369-379
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• 2003

한국 남동해역 대륙붕에서 취득된 고해상 탄성파 탐사자료와 퇴적물 시료의 분석에 의하면 후 제4기 퇴적층은 마지막 빙하기 이후의 해수면 변화에 의해 조절되는 저해수면계열, 해침계열, 고해수면계열로 구성된다. 시퀀스 경계면 위의 저해수면계열(층서단위 I)은 마지막 빙하기 동안 퇴적된 니질사 혹은 사질니 퇴적물로 구성되며 대륙붕단과 해곡의 외해역에 분포한다. 해침면과 최대해침면 사이에 위치하는 해침계열(층서단위 II)은 지난 15,000-6,000년 사이에 퇴적되었으며 주로 사질퇴적물로 구성된다. 해침계열은 연구해역 전반에 걸쳐 넓게 분포하지만 저해수면계열과 고해수면계열에 비해 박층으로 분포한다. 이러한 해침계열은 분포특성에 따라 3개의 소퇴적단위로 세분된다. 즉, 대륙붕단의 초기해침계열(Unit IIa), 중간대륙붕의 중기해침계열 (Unit IIb), 내대륙붕의 후기해침계열 (Unit IIc) 등으로 이들은 후배열층서의 특성을 가진다. 최대해침면 상부에 놓이는 고해수면계열(층서단위 III)은 해수면이 현수준에 도달한 지난 약 6,000년 이후에 퇴적된 현생 니질퇴적물로 구성되며 내대륙붕의 연안을 따라 제한적으로 분포한다.

• 설비공학논문집
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• 제18권1호
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• pp.1-6
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• 2006

This study was performed to evaluate sleep efficiencies and conditions for comfortable sleep based on the analysis of EEGs and MST under four thermals conditions. Five female subjects who have similar life cycle and sleep patterns were participated for the sleep experiment. Their age was from 20 to 22 years old. They were healthy, and had regular sleep with consistent bed and wakeup time. It was checked whether they had a good sleep before the night of experiment. Experiments were performed in an environmental chamber of $4.1\times4.9\times2.7m$ size. EEGs were obtained from C3-A2 and C4-Al electrode sites. Sleep stages were classified, then TST, SWS latency and SWS/TST were calculated for the evaluation for sleep efficiencies on thermal conditions. As results, it was concluded that indoor thermal environments of $24\~26^{\circ}C$ was the best for comfortable and deep sleep.

• 동의신경정신과학회지
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• 제24권3호
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• pp.281-292
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• 2013

Objectives : A growing body of evidence has suggested that the dysfunction of glutamatergic systems plays a pivotal role in major depressive disorder (MDD). This study was performed to investigate the antidepressant-like effects of the ethanolic extract of Gastrodia elata Bl (GE) in mouse models and to investigate the role of ${\alpha}$-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid (AMPA) receptors in producing these antidepressant-like effects. Methods : The forced swim test (FST) and tail suspension test (TST) were used to investigate GE's behavioral effects in mice. Additional biochemical and behavioral experiments with NBQX, an AMPA receptor antagonist, were undertaken to determine whether the antidepressant-like properties of GE are involved in AMPA receptor throughput. Results : Oral administration of GE extract (1,600 mg/kg) 1h prior to testing significantly reduced the immobility times in the FST and TST. These antidepressant-like effects of GE extract were increased dose-dependently. Pre-treatment with NBQX significantly attenuated the reduction in immobility time induced by the GE extract in the FST and TST. Conclusions : The ethanolic extract of GE may exert antidepressant-like effects with involvement of AMPA receptor.

• Tuberculosis and Respiratory Diseases
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• 제68권3호
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• pp.155-161
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• 2010

Background: The tuberculin skin test (TST) has limitations in diagnosing a latent tuberculosis infection (LTBI). The interferon-gamma release assay (IGRA) was introduced to middle- and high-school students since 2009 by the Korea Centers for Disease Control and Prevention. The aim was to evaluate the utility of IGRA in diagnosing LTBI in middle- and high-school students. Methods: From August 2007 to July 2009, among suspected LTBI students showing TST induration with a 10 mm diameter and over with a normal chest x-ray in school students of Jeju city, 341 students underwent a Quanti FERON-TB Gold In-Tube (QFT-IT) test to confirm LTBI. Results: From 348 students showing a positive TST, a QFT-IT test was carried out on 341 students. The positive QFT-IT rate was 52.8% (=180/341). The positive QFT-IT rate was higher in high-school boys with a 15~19 mm diameter of induration in TST. Conclusion: With the introduction of IGRA for diagnosing LTBI in middle- and high-school students, approximately 47% of students who show a TST induration with a 10 mm diameter and over can avoid taking unnecessary preventive chemotherapy. These results suggest that IGRA is useful for diagnosing and controlling LTBI in Korean students.

• Journal of Microbiology and Biotechnology
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• 제33권11호
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• pp.1521-1530
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• 2023

An α-L-rhamnosidase gene from Thermoclostridium. stercorarium subsp. thermolacticum DSM 2910 (TstRhaA) was cloned and expressed. The maximum TstRhaA activity of the protein reached 25.2 U/ml, and the molecular mass was approximately 106.6 kDa. The protein was purified 8.0-fold by Ni-TED affinity with an overall recovery of 16.6% and a specific activity of 187.9 U/mg. TstRhaA activity was the highest at 65℃ and pH 6.5. In addition, it exhibited excellent thermal stability, better pH stability, good tolerance to low concentrations of organic reagents, and high catalytic activity for p-nitrophenyl-α-L-rhamnopyranoside (pNPR). Substrate specificity studies showed that TstRhaA exhibited a high specific activity for rutin. At 60℃, pH 6.5, and 0.3 U/ml enzyme dosage, 60 g/l rutin was converted to 45.55 g/l isoquercitrin within 150 min. The molar conversion rate of rutin and the yield of isoquercitrin were 99.8% and 12.22 g/l/h, respectively. The results suggested that TstRhaA could be used for mass production of isoquercitrin.

• Tuberculosis and Respiratory Diseases
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• 제62권4호
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• pp.270-275
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• 2007

배 경: 결핵의 완전 퇴치를 위해서는 잠복결핵의 진단 및 치료를 통해 활동성 결핵으로 진행되는 것을 예방하는 것이 중요하다. 최근 QuantiFERON-TB Gold 검사가 잠복결핵의 진단을 위한 방법으로 승인되어 사용되고 있다. 본 연구에서는 지역 3차 종합병원에 근무하는 의료인을 대상으로 투베르쿨린 검사와 QuantiFERON-TB Gold 검사를 통해 잠복결핵을 진단하고, 잠복결핵을 치료한 후 투베르쿨린 검사와 QuantiFERON-TB Gold 검사의 변화를 알아보고자 하였다. 방 법: 2006년 경상대학교 병원에 근무중인 의료인 중 48명의 지원자(의사 14명, 간호사 34명, 남:여 =11:37, 평균연령=$29.9{\pm}5.5$세, 평균근무기간=$74.9{\pm}64.3$개월)를 대상으로 하였다. QuantiFERON-TB Gold 검사와 투베르쿨린 검사를 시행하여 의료인에서 잠복 결핵을 진단하고 두 검사의 일치율을 알아보았다. 그리고 QuantiFERON-TB Gold 검사가 양성인 지원자를 대상으로 Isoniazid(INH, 300 mg/day)와 Rifampin( RFP, 600 mg/day)을 3개월간 투약한 후 다시 투베르쿨린 검사와 QuantiFERON-TB Gold 검사를 시행하여 잠복결핵 치료 전후 두 검사의 변화를 확인하고 경결의 양성 기준에 따른 투베르쿨린 검사와 Quanti FERON-TB Gold 검사의 일치율을 알아보았다. 결 과: 48명의 지원자 중 투베르쿨린 검사는 경결 양성 기준을 10 mm 이상으로 하였을 때 19명(39.6%) 에서 양성, QuantiFERON-TB Gold 검사는 8명 (16.7%)에서 양성이었으며 두 검사의 일치율은 77.1%, ${\kappa}$값은 0.468이었고, 투베르쿨린 검사의 경결 양성 기준을 15 mm로 설정하면 두 검사의 일치율은 83.3%, ${\kappa}$값은 0.500이었다. 1명의 활동성 결핵 환자를 제외한 QuantiFERON-TB Gold 검사가 양성인 7명의 지원자에서 잠복결핵 치료 후에도 투베르쿨린 검사와 QuantiFERON-TB Gold 검사는 계속 양성이었다. 이들에게서 시행한 투베르쿨린 검사의 평균 경결은 잠복결핵 치료 전 $19.1{\pm}9.7mm$, 치료 후 $43.6{\pm}25.1mm$이었다. 결 론: 이번 연구의 결론으로는 투베르쿨린 검사와 QuantiFERON-TB Gold 검사로 잠복결핵의 치료 반응을 평가하는 것은 부적절하다고 판단되며 향후 이에 대한 더 많은 연구가 필요할 것으로 사료된다.

• Asian Pacific Journal of Cancer Prevention
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• 제14권12호
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• pp.7415-7419
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• 2013

The diagnosis of latent Mycobacterium tuberculosis infection (LTBI) is recommended in hematological malignancy patients and before hematopoietic stem cell transplantation (Guidelines for the prevention and management of infectious complications of solid organ transplantation, 2004). Compared to traditional methods such as tuberculin skin test (TST), T-SPOT.TB has been shown to be more specific. In the present study we enrolled 536 patients for whom T-SPOT.TB was performed, among which 295 patients also received the TST test. The agreement (79%) between T-SPOT.TB and TST was poor (x=0.274, P<0.001). The patients with positive T-SPOT.TB results numbered 62 (11.6%), in which only 20 (48.8%) of the 41 receiving the TST test had positive results. A majority of the patients with T-SPOT.TB positive results had some other evidence ofTB, such as TB history, clinical symptoms and an abnormal chest CT scan. Active TB was found in 9 patients, in which 2 had negative TST results. We followed up the patients and no one developed active TB. Our study suggested that the T-SPOT.TB may be more useful for screening LTBI and active TB in hematological malignancy patients and hematopoietic stem cell transplant recipients than the TST test.

• Tuberculosis and Respiratory Diseases
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• 제75권1호
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• pp.18-24
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• 2013

Background: We investigated the prevalence of latent tuberculosis infection (LTBI) among the health care workers (HCWs) and analyzed its risk factors in South Korea. Methods: A standard questionnaire regarding the baseline demographics and risk factors for LTBI was given to each participant and tuberculin skin test (TST), QuantiFERON-TB GOLD In-Tube (QFT-GIT) assay, and chest radiography were performed. Results: A total of 493 participants, 152 (30.8%) doctors and 341 (69.2%) nurses were enrolled in eight tertiary referral hospitals. The mean age of the subjects was 30.6 years old, and 383 (77.7%) were female. Of the 152 doctors, 63 (41.4%) and 36 (23.7%) were positive by TST and by QTF-GIT, respectively, and among the 341 nurses, 119 (34.9%) and 49 (14.4%) had positive TST and QFT-GIT results, respectively. Overall, the agreement between the two tests was 0.22 by the chance corrected proportional agreement rate (kappa coefficient) in 493 subjects. Experience of working in tuberculosis (TB)-related departments was significantly associated with positive LTBI test results by QFT-GIT assay, not by TST. In multivariate analysis, only age was independently associated with increased risk of a positive TST result, while age and experience of working in TB-related departments (odds ratio, 2.29; 95% confidence interval, 1.01-5.12) were independently associated with increased risk of a positive QFT-GIT result. Conclusion: A high prevalence of LTBI was found among South Korean HCWs. Considering the association between the experience of working in TB-related departments and high risk of LTBI, QFT-GIT may be a better diagnostic test for LTBI than TST in HCWs.

• Pediatric Infection and Vaccine
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• 제17권2호
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• pp.137-147
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• 2010

목적 : 본 연구는 소아에서 QuantiFERON-TB Gold(QTB) 검사의 임상적 유용성과 문제점을 평가하기 위해 시행되었다. 방 법: 2007년 1월부터 2009년 6월까지 본원에서 TST와 QTB를 시행 받은 소아청소년 112명의 의무 기록을 후향적으로 조사하였다. 결과 : TST와 QTB의 양성률은 각각 59.8%, 15.2%였고, 두 검사의 일치도는 낮았다($\kappa$=0.209). QTB의 민감도와 특이도는 각각 80.0%, 92.6%였다. QTB 양성율은 임상적 결핵군, 긴밀 접촉군, 일반 접촉군, 비접촉군에서 각각 80%, 14%, 0%, 2% 였으며, 판정보류의 빈도는 9.8%였다. QTB 추적 관찰이 시행된 환자 중, 초기 QTB 양성이었던 6명 중 5명은 치료 종료 후 평균 2.2개월까지 양성이 지속되었다. 결론 : 소아에서 QTB는 민감도가 낮고, 판정보류의 빈도가 높다는 단점이 있으나, 특이도가 높은 장점이 있으므로, TST의 특이도가 낮은 점을 보완하여 결핵의 진단 및 치료 결정에 활용될 수 있을 것으로 생각된다.