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Emergence of optrA-Mediated Linezolid-Nonsusceptible Enterococcus faecalis in a Tertiary Care Hospital

Park K, Jeong YS, Chang J, Sung H, Kim MN

This study investigated resistance mechanisms and epidemiology of emerging linezolid-nonsusceptible Enterococcus faecalis (LNSEF) in a tertiary care hospital. LNSEF isolated from clinical samples were collected from November 2017 to June...
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Molecular epidemiology and characterization of Streptococcus mutans strains in Korea

Kim SY, Bae IK, Lee JH, Shin JH, Kim JB

OBJECTIVES: We investigated the characteristics of Streptococcus mutans in the national culture collection from Korea. Twenty-nine (dental plaque, n=27; endodontic infections, n=1; blood, n=1) isolates were included in this study. METHODS:...
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Livestock-associated methicillin-resistant Staphylococcus aureus in Korea: antimicrobial resistance and molecular characteristics of LA-MRSA strains isolated from pigs, pig farmers, and farm environment

Back SH, Eom HS, Lee HH, Lee GY, Park KT, Yang SJ

The emergence of livestock-associated (LA)-methicillin-resistant Staphylococcus aureus (MRSA) in livestock animal has become a significant zoonotic concern. In the present study, we investigated nationwide prevalence of LA-MRSA across pork production...
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Comparison of Characteristics of Streptococcus dysgalactiae subsp. equisimilis Isolates Causing Repetitive vs Single Infections

Fujita T, Yoshida H, Osaka S, Hirose Y, Goto M, Nagano N, Takahashi

No study has described Streptococcus dysgalactiae subsp. equisimilis (SDSE) isolates that cause repetitive infections (recurrence and reinfection). We compared the microbiological characteristics of SDSE causing repetitive infections with those causing...
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Dissemination of Carbapenem-Resistance among Multidrug Resistant Pseudomonas aeruginosa carrying Metallo-Beta-Lactamase Genes, including the Novel bla(IMP-65) Gene in Thailand

Khuntayaporn P, Yamprayoonswat W, Yasawong M, Chomnawang MT

BACKGROUND: Pseudomonas aeruginosa is considered as one of the most emerging threats in this century. Serious infections caused by this pathogen are often treated by carbapenems which are the last...
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Molecular Analysis of Eight American Type Culture Collection Gonococcal Strains by Neisseria gonorrhoeae Multiantigen Sequence Typing and PorB Sequence Typing

Chung Y, Han M, Park JY, Kang S, Kim I, Park JA, Kim JS

BACKGROUND: Molecular epidemiological typing of Neisseria gonorrhoeae is crucial for monitoring the spread of resistant strains. As reference strains can be used for laboratory internal quality control, we genetically characterised...
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An Excel Macro for Determining Allelic and Sequence Types of Bacterial Clones in Multilocus Sequence Typing

Park YJ, Choi MH, Kim D, Lee K, Kim HO, Jeong SH

BACKGROUND: Multilocus sequence typing (MLST) was designed to overcome the low discriminatory power and poor reproducibility of previous molecular typing schemes, and it is useful for inter-laboratory, inter-regional, and inter-national...
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Identification and Characterization of NDM-1-producing Hypervirulent (Hypermucoviscous) Klebsiella pneumoniae in China

Liu Z, Gu Y, Li X, Liu Y, Ye Y, Guan S, Li J

BACKGROUND: Carbapenem-resistant hypervirulent (hypermucoviscous) Klebsiella pneumoniae (CR-HMKP) poses a significant public health challenge. We investigated its epidemiology and molecular characteristics in a tertiary care hospital in eastern China. METHODS: CR-HMKP were...
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Impact of Community-Onset Methicillin-Resistant Staphylococcus aureus on Staphylococcus aureus Bacteremia in a Central Korea Veterans Health Service Hospital

Bae E, Kim CK, Jang JH, Sung H, Choi Y, Kim MN

BACKGROUND: No study has examined the epidemiology of methicillin-resistant Staphylococcus aureus (MRSA) bacteremia in Korean veterans' hospitals. We investigated the microbiological and clinical epidemiology of S. aureus bacteremia at the...
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Biological and Genetic Characteristics of Clinically Isolated Enterobacter cloacae with Multidrug Resistance

Kim JJ, Koo SH

BACKGROUND: From January 2014 to December 2015, 69 clones of Enterobacter cloacae showing multidrug resistance to six classes of antimicrobial agents were collected from two medical centers in Korea. METHODS: Minimum...
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First Report of Two Colletotrichum Species Associated with Bitter Rot on Apple Fruit in Korea – C. fructicola and C. siamense

Park MS, Kim BR, Park IH, Hahm SS

Bitter rot caused by the fungal genus Colletotrichum is a well-known, common disease of apple and causes significant yield loss. In 2013, six fungal strains were isolated from Fuji apple...
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Comparison of Enterococcus faecium Bacteremic Isolates from Hematologic and Non-hematologic Patients: Differences in Antimicrobial Resistance and Molecular Characteristics

Cho SY, Park YJ, Cho H, Park DJ, Yu JK, Oak HC, Lee DG

BACKGROUND: Enterococcus faecium, especially vancomycin-resistant E. faecium (VREfm), is a major concern for patients with hematologic diseases. Exposure to antibiotics including fluoroquinolone, which is used as a routine prophylaxis for...
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Molecular Epidemiological Features and Antibiotic Susceptibility Patterns of Streptococcus dysgalactiae subsp. equisimilis Isolates from Korea and Japan

Kim S, Byun JH, Park H, Lee J, Lee HS, Yoshida H, Shibayama , Fujita T, Tsuyuki Y, Takahashi

BACKGROUND: The molecular characterization of Streptococcus dysgalactiae subsp. equisimilis (SDSE) has not yet been performed in Korea. This study aimed to find the differences or similarities in the clinical features,...
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Pathologic and molecular characterization of Streptococcus dysgalactiae subsp. equisimilis infection in neonatal piglets

Oh SI, Kim JW, Jung JY, Chae M, Lee YR, Kim JH, So B, Kim HY

Streptococcus dysgalactiae subspecies equisimilis (SDSE) is an emerging pathogen in animals and humans. Herein, we describe two clinical swine cases of SDSE infection presenting with lameness, neurological signs, or sudden...
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Extensively Drug-Resistant Escherichia coli Sequence Type 1642 Carrying an IncX3 Plasmid Containing the blaKPC-2 Gene Associated with Transposon Tn4401a

Jeong S, Kim JO, Yoon EJ, Bae IK, Lee W, Lee H, Park Y, Lee K, Jeong SH

BACKGROUND: Extensively drug-resistant (XDR) Enterobacteriaceae carrying the bla(KPC) gene have emerged as a major global therapeutic concern. The purpose of this study was to analyze the complete sequences of plasmids...
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Comparison of Multilocus Sequence Typing Change Patterns of Vancomycin-Resistant Enterococcus faecium from 2015 to 2017

Kim J, Kwon YI, Lee WG

BACKGROUND: Multilocus sequence typing (MLST) is useful in determining the long-term evolutionary process and minimizes differences in experimental results across individuals and laboratories. It is also useful in determining evolutionary...
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Uropathogenic Escherichia coli ST131 in urinary tract infections in children

Yun KW, Lee MK, Kim W, Lim IS

PURPOSE: Escherichia coli sequence type (ST) 131, a multidrug-resistant clone causing extraintestinal infections, has rapidly become prevalent worldwide. However, the epidemiological and clinical features of pediatric infections are poorly understood....
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Characterization of Oropharyngeal Carriage Isolates of Neisseria meningitidis in Healthy Korean Adolescents in 2015

Kim HW, Lee S, Kwon D, Cha J, Ahn JG, Kim KH

The meningococcus carriage rate is age-dependent, with a high prevalence in adolescents and young adults. This cross-sectional study aimed to estimate the oropharyngeal carriage rate of meningococcus among healthy Korean...
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Prevalence of Complement-Mediated Cell Lysis-like Gene (sicG) in Streptococcus dysgalactiae subsp. equisimilis Isolates From Japan (2014–2016)

Takahashi , Fujita T, Shibayama , Tsuyuki Y, Yoshida H

BACKGROUND: Streptococcus dysgalactiae subsp. equisimilis (SDSE; a β-hemolytic streptococcus of human or animal origin) infections are emerging worldwide. We evaluated the clonal distribution of complement-mediated cell lysis-like gene (sicG) among...
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Emergence of Panton-Valentine Leukocidin-Positive ST80 Clone of Community-Associated Methicillin-Resistant Staphylococcus aureus in Busan, Korea

Park SH, Hwang SM

Community-associated methicillin resistant Staphylococcus aureus (CA-MRSA) has become widespread in the community and healthcare settings, and a number of clonal lineages emerged on every country. Sequence type (ST) 80 clone...
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