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Molecular characterization of drug-resistant and -susceptible Mycobacterium tuberculosis isolated from patients with tuberculosis in Korea

Title
Molecular characterization of drug-resistant and -susceptible Mycobacterium tuberculosis isolated from patients with tuberculosis in Korea
Authors
Jee-Hyun Yoon;Ji-Sun Nam;Young-Tae Ro;Sang-Nae Cho;Hyeyoung Lee;Yeonim Choi;Kyung-Jin Kim
Issue Date
2012
Journal Title
Diagnostic Microbiology and Infectious Disease
ISSN
0732-8893
Citation
Diagnostic Microbiology and Infectious Disease, Vol.72(1) : 52~61, 2012
Abstract
We investigated the causal relationship between genotype and phenotype of drug-resistant Mycobacterium tuberculosis isolates obtained from patients with pulmonary tuberculosis (TB) in Korea. Of 80 isolates tested, 17, 20, 1, and 7 isolates were mono-resistant to ethambutol (EMB), isoniazid (INH), pyrazinamide (PZA), and rifampicin (RFP), respectively, and 31 isolates (38.8%) were multidrug-resistant (MDR). Sequencing analysis showed that 78% (32/41) of RFP-resistant strains had mutations in the rifampicin resistance-determining region (RRDR) of rpoB, and the mutation at rpoB531 (59.4%) was most abundant. In 52 INH-resistant strains, mutations were found mostly at C-15T (n = 21, 40.4%) in the inhA promoter region as well as at katG315 (n = 12, 23.1%). Mutations at embB306 were mostly found in 26.7% (12/45) of EMB-resistant isolates. New mutations found here in MDR isolates include rpoB523 (Gly523Glu) and embB319 (Tyr319Ser). Consequently, mutations in the rpoB531, C-15T in the inhA promoter region, embB306, and katG315 would be a useful marker for rapid detection of MDR M. tuberculosis isolates in Korea.
URI
http://www.sciencedirect.com/science/article/pii/S0732889311003646

http://ir.ymlib.yonsei.ac.kr/handle/22282913/90128
DOI
10.1016/j.diagmicrobio.2011.09.010
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Microbiology
Yonsei Authors
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