Author: ["Mariela Scortti","Lizeth Lacharme-Lora","Martin Wagner","Isabel Chico-Calero","Patrizia Losito","José A Vázquez-Boland"]
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Abstract
Discrepancies between resistance in vitro and therapeutic efficacy in vivo are generally attributed to failure of laboratory susceptibility tests to reflect an antibiotic's pharmacokinetic or pharmacodynamic properties. We show here that this phenomenon can result from differential in vitro–in vivo expression of bacterial determinants of antibiotic susceptibility. We found that an in vivo–induced virulence factor, Hpt, also mediates uptake of fosfomycin in Listeria monocytogenes. These bacteria therefore seem resistant to fosfomycin in vitro, although they are in fact susceptible to the antibiotic during infection.Cite this article
Scortti, M., Lacharme-Lora, L., Wagner, M. et al. Coexpression of virulence and fosfomycin susceptibility in Listeria: molecular basis of an antimicrobial in vitro–in vivo paradox. Nat Med 12, 515–517 (2006). https://doi.org/10.1038/nm1396 