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Biol Pharm Bull. 2005 Aug;28(8):1505-8.

Multidrug resistance in Klebsiella pneumoniae MGH78578 and cloning of genes responsible for the resistance.

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Department of Molecular Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Tsushima-Naka, Okayama 700-8530, Japan.


Klebsiella pneumoniae MGH78578, a clinical isolate, showed high level of resistance to many antimicrobial agents. We cloned genes responsible for drug resistance from chromosomal DNA of K. pneumoniae MGH78578 by shotgun method using Escherichia coli KAM32, a drug hypersensitive strain, as host. We obtained 43 hybrid plasmids that made host cells resistant to several antimicrobial agents. We classified them into 17 groups based on growth properties in the presence of each one of 9 antimicrobial agents and on restriction patterns of each hybrid plasmid. Analysis of the cloned genes must be very useful for investigation of major parts of multidrug resistance systems including multidrug efflux pumps in K. pneumoniae MGH78578 in which genome sequence is available.

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