• 대한의생명과학회지
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• 제15권4호
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• pp.295-300
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• 2009

Tuberculosis caused by Mycobacterium tuberculosis (MTB) still remains to be the most dreadful infectious disease affecting almost every country. In the present study, we developed a simple and rapid but accurate and sensitive assay method for detecting MTB using microplate hybridization assay. For this, a selective region of the rpoB gene was used to design PCR primers, and MTB and Mycobacterium genus-specific probe molecules. The specificity of the assay was confirmed using fifteen different mycobacterial reference strains and twelve different non-mycobacterial reference strains, and the sensitivity was determined to be 100 fg using genomic DNA of MTB reference strain, H37Rv. Subsequently, a total of 62 sputum samples with diverse smear scores and culture positive results were used to evaluate the kit performance. In brief, the specificity and the sensitivity of the assay were 100% and 98.4%, respectively.

• Tuberculosis and Respiratory Diseases
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• 제75권4호
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• pp.157-160
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• 2013

Incidence of nontuberculous mycobacterium (NTM) pulmonary disease is increasing with the wider recognition and development of diagnostic technology. Mycobacterium kansasii is the second most common pathogen of NTM pulmonary disease in human immunodeficiency virus (HIV)-infected patients. However in Korea, the incidence of M. kansasii pulmonary disease is relatively low, and there has been no report of M. kansasii pulmonary disease with bronchial involvement in HIV patients, to the best of our knowledge. We report a case of M. kansasii pulmonary disease presenting with endobronchial lesions in an HIV-infected patient complaining of chronic cough with bilateral enlargements of hilar lymph nodes on chest X-ray.

• 한국동물위생학회지
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• 제32권2호
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• pp.125-129
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• 2009

SBovine tuberculosis is a chronic bacterial disease of animals and humans caused by Mycobacterium bovis. Besides the classical intradermal tuberculin test, a number of blood and serum tests have been used. The purpose of this study was to establish seroprevalence of M. bovis. The sera were screened using the ELISA technique. A total seroprevalence of 65.8% in positive cattle, suspect 36.0%, negative 5.9% in TB-infected herds by PPD and dairy cattle is 3.0%, Hanwoo is 1.6% in TB-free herds. The deer of seroprevalence is 55.0% in TB-infected herd and 7.7% in TB-free herds.

• 대한의생명과학회지
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• 제16권2호
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• pp.127-131
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• 2010

Mycobacterium leprae detection is difficult even with molecular biological techniques due to the low sensitivity of current methodologies. In this report, real-time PCR targeting the M. leprae-specific repetitive element (RLEP) sequence was developed as a new diagnostic tool and evaluated using clinical specimens. For this, M. leprae DNAs were extracted from skin biopsy specimens from 80 patients and analyzed by real-time PCR using TaqMan probe. Then, the detection efficiency of the real-time PCR was compared with that of standard PCR. In brief, the rate of positive detection by the standard PCR and real-time PCR was 32.50% and 66.25%, respectively. The results seemed to clearly show that the TaqMan real-time PCR developed in this study may be a useful tool for sensitive detection of M. leprae from clinical specimens.

• Journal of Microbiology
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• 제45권3호
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• pp.268-271
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• 2007

In Korea, the Mycobacterium tuberculosis K-strain is the most prevalent clinical isolates and belongs to the Beijing family. In this study, we conducted comparative porteomics of expressed proteins of clinical isolates of the K-strain with H37Rv, H37Ra as well as the vaccine strain of Mycobacterium bovis BCG following phagocytosis by the human monocytic cell line U-937. Proteins were analyzed by 2-D PAGE and MALDI-TOF-MS. Two proteins, Mb1363 (probable glycogen phosphorylase GlgP) and MT2656 (Haloalkane dehalogenase LinB) were most abundant after phagocytosis of M. tuberculosis K-strain. This approach provides a method to determine specific proteins that may have critical roles in tuberculosis pathogenesis.

• Tuberculosis and Respiratory Diseases
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• 제72권2호
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• pp.191-196
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• 2012

While nontuberculous mycobacterium (NTM) infections are recently on the rise, arthritis caused by NTM is hardly reported in Korea. NTM arthritis has no distinctive clinical characteristics from chronic arthritis. Tuberculosis of the joint specifically produces similar clinical and pathologic presentations to NTM arthritis, so it is not easy to distinguish between them. We report a case of Mycobacterium intracellulare in an arthritis patient after trauma and surgical repair of the injury. At the beginning, the patient was diagnosed as tuberculous tenosynovitis through pathology without microbiologic evidence. The final diagnosis was made after subsequent recurrences for several years. The misdiagnosis and delayed diagnosis led to irreversible joint destruction and functional impairment. NTM infection must be included in the differential diagnosis of chronic arthritis at the outset.

• 대한수의학회지
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• 제41권4호
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• pp.535-542
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• 2001

A multiplex PCR technique was developed for detecting specifically each Mycobacterium bovis, M. tuberculosis, M. avium and M. avium subsp, paratuberculosis, respectively, using clinical samples of field cattle. To apply this novel technique to clinical specimens, blood sample was obtained from live cows comprising 11 intradermal tuberculin test (ITT)-positive and 17 ITT-negative and tested by multiplex PCR. Positive results were obtained from 15 cows by the multiplex PCR, showing that 4 (23.5%) of the 17 ITT-negative cows were multiplex PCR positive. The multiplex PCR results also showed that among the 15 positive cows, 7 (46.7%) were infected with M. bovis, 1 (6.7%) with M. tuberculosis and 7 (46.7%) with M. avium. The sensitivity and specificity of multiplex PCR in comparison with those of ITT were 100% and 76.5%. The correlation between the multiplex PCR and ITT assays with blood samples was considered excellent, 85.7% agreement and ${\kappa}=0.72$. The results obtained, using reference mycobacterial strains and typed clinical samples, show that the multiplex PCR method may be a rapid, sensitive, and specific tool for the differential identification of various mycobacterial strains in a single-step assay. Therefore, multiplex PCR assay is a useful tool for early diagnosis of tuberculosis in live cattle and to identify the species or complex of mycobacterium from clinical samples.

• Tuberculosis and Respiratory Diseases
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• 제69권3호
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• pp.207-211
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• 2010

Novel influenza A (H1N1) virus is a common pathogen of febrile respiratory infection recently. Here, we report the case of a 63-year-old male patient who presented with 3 days' ongoing cough and fever. He was diagnosed with novel influenza A (H1N1) pneumonia by real-time reverse-transcriptase-polymerase-chain-reaction (rRT-PCR). During treatment for novel influenza A (H1N1), his symptoms and radiologic findings improved initially, but multiple lung nodules developed subsequently and found on chest x-ray (on the 5th hospital day). Mycobacterium abscessus was isolated repeatedly from sputum and bronchoalveolar lavage fluid. To our knowledge, this is the first reported case of Mycobacterium abscessus lung disease in a patient with H1N1 influenza pneumonia.

• Clinical and Experimental Pediatrics
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• 제49권10호
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• pp.1116-1119
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• 2006

화농근육염은 골격근의 원발성 세균 감염으로, 주로 대퇴사두근이나 둔근에 발생한다. 화농근육염의 병리기전은 잘 알려져 있지 않으나 국소부위의 외상과 동반된 균혈증에 의한 것으로 설명되며, Staphylococcus aureus가 가장 흔한 원인균이다. Mycobacterium tuberculosis은 폐결핵을 일으키는 경우가 가장 흔하며, 활동성 폐결핵과 근골격계 결핵이 동반되는 경우는 약 30%이다. 근육내 결핵은 폐결핵을 일으키는 Mycobacterium tuberculosis가 근육 내로 침입하여 발병하는 것으로, 폐외 결핵 중 비교적 드문 형태이다. 저자들은 17개월 여아에서 다른 부위의 결핵을 동반하지 않은 근육내 결핵 1례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다.

• 생명과학회지
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• 제15권2호
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• pp.182-185
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• 2005

IS1096 transposon을 사용하여 결핵균군에 작용하는 항생제인 PA-824에 내성을 나타내는 Mycobacterium bovis BCG의 돌연변이 균주를 얻고자 하였고, 그 결과 24종류의 서로 다른 돌연변이 균주를 얻을 수 있었다. Transposon이 insertion된 부위를 알아내기 위해서 각각의 돌연변이 균주로 inverse PCR을 수행하였고, PPE 유전자를 포함한 여러 가지 부위에 insertion된 transposon의 위치를 확인할 수 있었다. PPE 유전자에 insertion돌연변이가 발생한 5개 균주의 세포 추출물을 HPLC로 분석한 결과, 3개에서는 야생균주에서 관찰되는 coenzyme $F^{420}$이 존재하지 않았고, 그 생합성 경로의 중간산물인 F0만 존재하였다. 또한 나머지 2개에서는 F0 또는 $F^{420}$어느 것도 존재하지 않았다. 이 결과는 PPE 유전자들의 산물들이 coenzyme $F^{420}$에 어떤 식으로든 관여하고 있음을 나타낸다고 할 수 있다.