Université de Fribourg

Cross-resistance to human cationic antimicrobial peptides and to polymyxins mediated by the plasmid-encoded MCR-1?

Dobias, Jan ; Poirel, Laurent ; Nordmann, Patrice

In: Clinical Microbiology and Infection, 2017, p. -

To evaluate whether acquired resistance to cationic antimicrobial peptides (CAMP) group molecules, being normal components of the human immune system, may select co-resistance to antibiotic peptides such as polymyxins, considering they share the same mechanism of action. We aimed to evaluate strains producing the recently identified plasmid-encoded polymyxin resistance determinant MCR-1,...

Université de Fribourg

The mgrB gene as a key target for acquired resistance to colistin in Klebsiella pneumoniae

Poirel, Laurent ; Jayol, Aurélie ; Bontron, Séverine ; Villegas, Maria-Virginia ; Ozdamar, Melda ; Türkoglu, Salih ; Nordmann, Patrice

In: Journal of Antimicrobial Chemotherapy, 2015, vol. 70, no. 1, p. 75-80

Objectives Alterations in the PhoPQ two-component regulatory system may be associated with colistin resistance in Klebsiella pneumoniae. MgrB is a small transmembrane protein produced upon activation of the PhoPQ signalling system, and acts as a negative regulator on this system. We investigated the role of the MgrB protein as a source of colistin resistance in a series of K. pneumoniae.Methods...

Université de Fribourg

KPC-producing Klebsiella pneumoniae, finally targeting Turkey

Labarca, Jaime ; Poirel, Laurent ; Özdamar, M. ; Turkoglü, S. ; Hakko, E. ; Nordmann, Patrice

In: New Microbes and New Infections, 2014, vol. 2, no. 2, p. 50–51

We report here the first identification of the worldwide spread of Klebsiella pneumoniae carbapenemase-2-producing and carbapenem-resistant K. pneumoniae clone ST258 in Turkey, a country where the distantly-related carbapenemase OXA-48 is known to be endemic. Worryingly, this isolate was also resistant to colistin, now considered to be the last-resort antibiotic for carbapenem-resistant isolates.