Conjugative Plasmid Transfer in the Biofilm Formed by Enterococcus faecalis

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概要

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• Enterococcus faecalis (E. faecalis) ATCC51299 used as a control in screening for high-level aminoglycoside resistance in enterococci was observed to transfer plasmids to the clinically isolated E. faecalis strain 4437 in a broth medium. From a mixed culture of strain ATCC51299 and strain 4437, transconjugants were obtained not only from the planktonic phase but also from biofilm. Plasmid transfer frequency was approximately one order higher among cells in the biofilm than among those in the planktonic phase. When the biofilm formed by the recipient strain E. faecalis 4437 was inoculated with the donor strain E. faecalis ATCC51299, correlations were observed between the number of donor cells and transconjugants, and the number of donor cells and transfer frequency in the biofilm (r=0.99, 0.98, respectively). In addition, the transfer frequency in biofilm remained constant after 9-hr incubation, while transfer frequency in the planktonic phase decreased with incubation time. These results suggest that the biofilm formed by enterococci on surfaces gives rise to efficient gene transfer.

• 公益社団法人日本薬学会の論文
• 2006-08-01

著者

• Kato Fumio

  Department of Microbiology, School of Pharmaceutical Sciences, Toho University

• Wada Hideki

  Department Of Research And Development Yoshida Pharmaceutical Co. Ltd.

• Wada Hideki

  Department Of Biology And Geology Faculty Of Science Shizuoka University

• Kato Fumio

  産業医科大学 放射線衛生

• Fumio Kato

  Department Of Microbiology School Of Pharmaceutical Sciences Toho University

• Kato Fumio

  Department Of Applied Biological Science Faculty Of Agriculture Saga University

• Kajiura Takumi

  Department of Research and Development, Yoshida Pharmaceutical Co., Ltd.

• Ito Kenji

  Department of Research and Development, Yoshida Pharmaceutical Co., Ltd.

• Anzai Yojiro

  Department of Microbiology, Faculty of Pharmaceutical Sciences, Toho University

• Kajiura T

  Department Of Research And Development Yoshida Pharmaceutical Co. Ltd.

• Anzai Yojiro

  Faculty Of Pharmaceutical Sciences Toho University

• Kato Fumio

  Department Of Agricultural Chemistry Saga University

• Ito Kenji

  Department Of Oral And Maxillofacial Surgery Nagoya University Graduate School Of Medicine

• Ito Kenji

  Department Of Research And Development Yoshida Pharmaceutical Co. Ltd.

• Ito Kenji

  Department Of Anesthesiology Tokai University School Of Medicine

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