• Title/Summary/Keyword: oxyiminocephalosphorins

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Characterization of Plasmid-Mediated SHV-11 β-lactamase Gene of Klebsiella pneumoniae Isolated from the Clinical Specimens (임상검체로부터 분리한 플라스미드 매개성 SHV-11 β-lactamase 유전자의 특성)

  • Kim, Yun-Tae;Lee, Sang-Hoo;Jang, Ji-Hyun;Kim, Tae-Un;Choi, Seok-Cheol;Baik, Hyung-Suk;Lee, Kyoung-Ryul;Yoon, Hye-Ryoung;Kim, Young-Jin
    • Journal of Life Science
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    • v.19 no.12
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    • pp.1718-1723
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    • 2009
  • In this study, we characterized extended-spectrum $\beta$-lactamase (ESBL)-producing Enterobacteriaceae isolated from clinical specimens in Korea and found two strains harboring plasmid-mediated $bla_{SHV-11}$, Klebsiella pneumoniae. First, the isolates were detected using the Vitek system and confirmed by the double-disk synergy test. The classification of gene coding for ESBL was also performed by polymerase chain reactions and followed by DNA sequencing. The transmission of genes was confirmed by transconjugation and transformation. Resistant expression of transformants was determined by broth microdilution minimal inhibitory concentration test. Genotypic analysis revealed that one strain harbored the $bla_{TEM-1}$, $bla_{SHV-11}$ and $bla_{CTX-M-15}$ and the other strain harbored the $bla_{SHV-11}$ and $bla_{CTX-M-15}$. They showed high resistance to oxyiminocephalosphorins (3rd-generation cephalosporins), while the transformant containing only $bla_{SHV-11}$ did not show any resistance to the antibiotics.