title: Emergence of an extended-spectrum β-lactamase-producing serotype K1 Klebsiella pneumoniae ST23 strain from Asian countries.
abstract: Extended-spectrum β-lactamase (ESBL) production has been very rare in serotype K1 Klebsiella pneumoniae ST23 strains, which are well-known invasive community strains. Among 92 ESBL-producing strains identified in 218 isolates from nine Asian countries, serotype K1 K. pneumoniae strains were screened. Two ESBL-producing K. pneumoniae isolates from Singapore and Indonesia were determined to be serotype K1 and ST23. Their plasmids, which contain CTX-M-15 genes, are transferable rendering the effective transfer of ESBL resistance plasmids to other organisms.
authors.affiliation: Division of Infectious Diseases,Konkuk University Hospital, Konkuk University School of Medicine,Seoul,Korea.
authors.forename: H S
authors.initials: HS
authors.lastname: Cheong
authors.affiliation: Division of Infectious Diseases,Samsung Medical Centre, Sungkyunkwan University School of Medicine,Seoul,Korea.
authors.forename: D R
authors.initials: DR
authors.lastname: Chung
authors.affiliation: Asia Pacific Foundation for Infectious Diseases,Seoul,Korea.
authors.forename: M
authors.initials: M
authors.lastname: Park
authors.affiliation: Asia Pacific Foundation for Infectious Diseases,Seoul,Korea.
authors.forename: S H
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Asia Pacific Foundation for Infectious Diseases,Seoul,Korea.
authors.forename: K S
authors.initials: KS
authors.lastname: Ko
authors.affiliation: Division of Infectious Diseases,Samsung Medical Centre, Sungkyunkwan University School of Medicine,Seoul,Korea.
authors.forename: Y E
authors.initials: YE
authors.lastname: Ha
authors.affiliation: Division of Infectious Diseases,Samsung Medical Centre, Sungkyunkwan University School of Medicine,Seoul,Korea.
authors.forename: C I
authors.initials: CI
authors.lastname: Kang
authors.affiliation: Division of Infectious Diseases,Samsung Medical Centre, Sungkyunkwan University School of Medicine,Seoul,Korea.
authors.forename: K R
authors.initials: KR
authors.lastname: Peck
authors.affiliation: Division of Infectious Diseases,Samsung Medical Centre, Sungkyunkwan University School of Medicine,Seoul,Korea.
authors.forename: J H
authors.initials: JH
authors.lastname: Song
mesh_terms: D000942:Antigens, Bacterial / Q000032:analysis*; D001208:Asia / Q000453:epidemiology; D005838:Genotype; D006801:Humans; D007710:Klebsiella Infections / Q000453:epidemiology* / Q000382:microbiology*; D007711:Klebsiella pneumoniae / Q000145:classification* / Q000201:enzymology / Q000235:genetics / Q000302:isolation & purification; D058889:Molecular Typing; D010957:Plasmids / Q000032:analysis; D011135:Polysaccharides, Bacterial / Q000032:analysis*; D065288:Serogroup; D001618:beta-Lactamases / Q000235:genetics / Q000378:metabolism*
chemical_list: D000942:Antigens, Bacterial; D011135:Polysaccharides, Bacterial; C036962:capsular polysaccharide K1; C473109:beta-lactamase CTX-M-15; D001618:beta-Lactamases
keywords:  Klebsiella pneumoniae ; Extended-spectrum β-lactamase; serotype K1