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Antimicrobial Agents and Chemotherapy, November 2007, p. 4163-4166, Vol. 51, No. 11
0066-4804/07/$08.00+0 doi:10.1128/AAC.00156-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
Influence of Inoculum Size on the Selection of Resistant Mutants of Escherichia coli in Relation to Mutant Prevention Concentrations of Marbofloxacin
Aude Ferran,
Véronique Dupouy,
Pierre-Louis Toutain, and
Alain Bousquet-Mélou*
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Vétérinaire de Toulouse, 23 chemin des Capelles, BP 87 614, 31076 Toulouse Cedex 3, France
Received 2 February 2007/
Returned for modification 13 June 2007/
Accepted 13 August 2007
We demonstrate using an in vitro pharmacodynamic model that the likelihood of selection of Escherichia coli mutants resistant to a fluoroquinolone was increased when the initial size of the bacterial population, exposed to fluoroquinolone concentrations within the mutant selection window, was increased.
* Corresponding author. Mailing address: UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Vétérinaire de Toulouse, 23 chemin des Capelles, BP 87 614, 31076 Toulouse Cedex 3, France. Phone: 33 (0) 5 61 19 39 25. Fax: 33 (0) 5 61 19 39 17. E-mail:
a.bousquet-melou{at}envt.fr
Published ahead of print on 20 August 2007.
Antimicrobial Agents and Chemotherapy, November 2007, p. 4163-4166, Vol. 51, No. 11
0066-4804/07/$08.00+0 doi:10.1128/AAC.00156-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
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