Journal of Microbiology

Kyungwon Lee

7 Articles

Parabacteroides chongii sp. nov., isolated from blood of a patient with peritonitis: Hyunsoo Kim , Wan-Taek Im , Myungsook Kim , Dokyun Kim , Young Hee Seo , Dongeun Yong , Seok Hoon Jeong , Kyungwon Lee; J. Microbiol. 2018;56(10):722-726. Published online September 28, 2018; DOI: https://doi.org/10.1007/s12275-018-8122-3

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An obligate anaerobic, Gram-reaction-negative, non-sporeforming, non-motile, rod shaped bacterium designated YMC B3181T was isolated from the blood of a patient with peritonitis. Strain B3181T grew at 20 to 40°C with optimum growth at 37°C. 16S rRNA gene sequence similarity showed strain B3181T belongs to the genus Parabacteroides and is closely related to Parabacteroides faecis 157T (97.3%), Parabacteroides gordonii MS-1T (96.6%), and Parabacteroides goldsteinii DSM 19448T (95.7%). The G + C content of the genomic DNA was 42.3 mol%. The major cellular fatty acids were anteiso- C15:0 and iso-C17:0 3-OH, and the predominant respiratory quinones were MK-9 and MK-10 menaquinones. Genomic and chemotaxonomic data supported affiliation of B3181T with the genus Parabacteroides. Strain B3181T was phylogenetically and phenotypically different from recognized species of the genus Parabacteroides. Accordingly, this isolate belongs to a novel species for which the name Parabacteroides chongii sp. nov. (type strain YMC B3181T = LMG 30065T = KACC 19034T) is proposed.

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Comparison of the Genetic Structures Surrounding qnrA1 in Korean Enterobacter cloacae and Chinese Escherichia coli Strains Isolated in the Early 2000s: Evidence for qnrA Mobilization via Inc HI2 Type Plasmid: Sang Hoon Han , Young Ah Kim , Minggui Wang , Yangsoon Lee , Hae-Sun Chung , Jong Hwa Yum , Dongeun Yong , Kyungwon Lee , June Myung Kim; J. Microbiol. 2012;50(1):166-169. Published online February 27, 2012; DOI: https://doi.org/10.1007/s12275-012-1350-z

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The flanking genetic structure of qnrA1 in Korean Enterobacter cloacae was identical to that of the Chinese Escherichia coli strain, the first qnrA1-carrying strain reported in Asia. Analysis of restriction enzyme sites and Southern blot hybridization results showed that qnrA1 was transferred between E. cloacae and E. coli via Inc HI2 type plasmid.

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Antimicrobial resistance and epidemiology of extended spectrum-β-lactamases (ESBL)-producing Escherichia coli and Enterobacter cloacae isolates from intensive care units at obstetrics & gynaecology departments: a retrospective analysis
Kun Chen, Guo-Liang Yang, Wen-Ping Li, Ming-Cheng Li, Xue-Ying Bao
Clinical and Experimental Obstetrics & Gynecology.2021;[Epub] CrossRef
The spread and acquisition of NDM-1: a multifactorial problem
Alexander M Wailan, David L Paterson
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Genetic Diversity of Chromosomal Metallo-β-Lactamase Genes in Clinical Isolates of Elizabethkingia meningoseptica from Korea: Jong Hwa Yum , Eun Young Lee , Sung-Ho Hur , Seok Hoon Jeong , Hyukmin Lee , Dongeun Yong , Yunsop Chong , Eun-Woo Lee , Patrice Nordmann , Kyungwon Lee; J. Microbiol. 2010;48(3):358-364. Published online June 23, 2010; DOI: https://doi.org/10.1007/s12275-010-9308-5

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This study was performed to characterize the chromosomal metallo-β-lactamases (MBLs) of Elizabethkingia meningoseptica isolated from Korea and to propose a clustering method of BlaB and GOB MBLs based on their amino acid similarities. Chromosomal MBL genes were amplified by PCR from 31 clinical isolates of E. meningoseptica. These PCR products were then cloned into a vector and electrotransformed into E. coli DH5α. Nucleotide sequencing was performed by the dideoxy chain termination method using PCR products or cloned DNA fragments. Antimicrobial susceptibilities were determined by the agar dilution method. PCR experiments showed that all 31 E. meningoseptica isolates contained both the blaB and the blaGOB genes. DNA sequence analysis revealed that E. meningoseptica isolates possessed seven types of blaB gene, including five novel variants (blaB-9 to blaB-13) and 11 types of blaGOB gene, including 10 novel variants (blaGOB-8 to blaGOB-17). The most common combination of MBL was BlaB-12 plus GOB-17 (n=19). Minimum inhibitory concentrations of imipenem and meropenem for the electrotransformants harboring novel BlaB and GOB MBLs were two- or four-fold higher than those for the recipient E. coli DH5α. BlaB and GOB MBLs were grouped in three and six clusters including fifteen novel variants, respectively, based on amino acid similarities.

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Applied and Environmental Microbiology.2018;[Epub] CrossRef
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International Journal of Antimicrobial Agents.2017; 50(4): 507. CrossRef
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Relative Prevalence and Antimicrobial Susceptibility of Clinical Isolates of Elizabethkingia Species Based on 16S rRNA Gene Sequencing
Mi-Soon Han, Hyunsoo Kim, Yangsoon Lee, Myungsook Kim, Nam Su Ku, Jun Yong Choi, Dongeun Yong, Seok Hoon Jeong, Kyungwon Lee, Yunsop Chong, Karen C. Carroll
Journal of Clinical Microbiology.2017; 55(1): 274. CrossRef
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ERRATUM - VanB-vanA Incongruent VRE Isolated from Animals and Humans in 1999: Enjoo Shin , Hyun-gin Hong , Yasuyoshi Ike , Kyungwon Lee , Yong Ho Park , Dong Taek Lee , Yeonhee Lee; J. Microbiol. 2006;44(5):581-581.

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Abstract PDF: In the article by Lee et al. that appears in the Journal of Microbiology 2006 44: 453-456, the second author’s name should be Hyunjin Hong and the 6th author’s name should be Dong Taek Cho.

VanB-vanA Incongruent VRE Isolated from Animals and Humans in 1999: Enjoo Shin , Hyunjin Hong , Yasuyoshi Ike , Kyungwon Lee , Yong Ho Park , Dong Taek Cho , Yeonhee Lee; J. Microbiol. 2006;44(4):453-456.; DOI: https://doi.org/2406 [pii]

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Abstract PDF: 16 chicken isolates and four clinical isolates of VanB-vanA incongruent vancomycinresistant Enterococcus faecium strains without vanS were isolated in 1999. Pulsed-field gel electrophoresis revealed only a peripheral relationship between the chicken isolates and clinical isolates, but suggested clonal spread in the chicken isolates.

Outbreaks of Imipenem-Resistant Acinetobacter baumannii Producing Carbapenemases in Korea: Seok Hoon Jeong , Il Kwon Bae , Kwang Ok Park , Young Jun An , Seung Ghyu Sohn , Seon Ju Jang , Kwang Hoon Sung , Ki Suk Yang , Kyungwon Lee , Dongeun Young , Sang Hee Lee; J. Microbiol. 2006;44(4):423-431.; DOI: https://doi.org/2410 [pii]

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Abstract PDF: Among 53 Acinetobacter baumannii isolates collected in 2004, nine imipenem-resistant isolates were obtained from clinical specimens taken from patients hospitalized in Busan, Korea. Nine carbapenemase-producing isolates were further investigated in order to determine the mechanisms underlying resistance. These isolates were then analyzed via antibiotic susceptibility testing, microbiological tests of carbapenemase activity, pI determination, transconjugation test, enterobacterial repetitive consensus (ERIC)-PCR, and DNA sequencing. One outbreak involved seven cases of infection by A. baumannii producing OXA-23 β-lactamase, and was found to have been caused by a single ERIC-PCR clone. During the study period, the other outbreak involved two cases of infection by A. baumannii producing IMP-1 β-lactamase. The two clones, one from each of the outbreaks, were characterized via a modified cloverleaf synergy test and an EDTA-disk synergy test. The isoelectric focusing of the crude bacterial extracts detected nitrocefin-positive bands with pI values of 6.65 (OXA-23) and 9.0 (IMP-1). The PCR amplification and characterization of the amplicons via direct sequencing showed that the clonal isolates harbored blaIMP-1 or blaOXA-23 determinants. The two clones were characterized by a multidrug resistance phenotype that remained unaltered throughout the outbreak. This resistance encompassed penicillins, extended-spectrum cephalosporins, carbapenems, monobactams, and aminoglycosides. These results appear to show that the imipenem resistance observed among nine Korean A. baumannii isolates could be attributed to the spread of an IMP-1- or OXA-23-producing clone. Our microbiological test of carbapenemase activity is a simple method for the screening of clinical isolates producing class D carbapenemase and/or class B metallo-β-lactamase, in order both to determine their clinical impact and to prevent further spread.

DD1.5k, the Gene Preferentially Expressed in Bloodstream Isolates of Vancomycin-Resistant Enterococcus faecium: Seung-Han Kim , Dong-Gun Lee , Jin-Hong Yoo , Su-Mi Choi , Jung-Hyun Choi , Wan-Shik Shin , Kyungwon Lee , Dongeun Yong , Wee Gyo Lee , Byung-S. Youn , Moon-Won Kang; J. Microbiol. 2004;42(2):143-146.

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Abstract PDF: Vancomycin-resistant Enterococcus faecium (VREFM) is becoming a threatening pathogen. We identified a gene called DD1.5K by differential display-PCR, which was preferentially expressed in the bloodstream isolates of VREFM. Due to its amino acid similarity to transfer complex protein, trsE, and tissue-specific expression, this gene may be involved in virulence of VREFM.

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