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Université de Fribourg

Efficacy of dual carbapenem treatment in a murine sepsis model of infection due to carbapenemase-producing Acinetobacter baumannii

Cebrero-Cangueiro, T. ; Nordmann, Patrice ; Carretero-Ledesma, M. ; Pachón, J. ; Pachón-Ibáñez, M. E.

In: Journal of Antimicrobial Chemotherapy, 2020, p. dkaa487

Objectives: To evaluate the in vivo efficacy of a dual carbapenem combination containing imipenem plus meropenem against carbapenem-resistant Acinetobacter baumannii producing carbapenemases OXA-23 or OXA-58.Methods: An experimental model of peritonitis using C57BL/6J female mice was developed and the minimum lethal doses were calculated for infections due to OXA-23 or OXA-58 producers of A. ...

Université de Fribourg

Cross-border emergence of clonal lineages of ST38 Escherichia coli producing the OXA-48-like carbapenemase OXA-244 in Germany and Switzerland

Falgenhauer, Linda ; Nordmann, Patrice ; Imirzalioglu, Can ; Yao, Yancheng ; Falgenhauer, Jane ; M.Hauri, Anja ; Heinmüller, Petra ; Chakraborty, Trinad

In: International Journal of Antimicrobial Agents, 2020, vol. 56, no. 6, p. 106157

Background: Carbapenemase-producing Gram-negative bacteria cause infections that are difficult to treat and represent a rising threat to healthcare systems worldwide. This study analysed isolates of Escherichia coli (E. coli), a species associated with nosocomial-acquired and community-acquired infections, from hospitals in Germany and Switzerland exhibiting a slight decrease in...

Université de Fribourg

Dimercaptosuccinic acid in combination with carbapenems against isogenic strains of Escherichia coli producing or not producing a metallo-β-lactamase in vitro and in murine peritonitis

Cheminet, G. ; de Lastours, V. ; Poirel, Laurent ; Chau, F. ; Peoc’h, K. ; Massias, L. ; Fantin, B. ; Nordmann, Patrice

In: Journal of Antimicrobial Chemotherapy, 2020, vol. 75, no. 12, p. 3593–3600

Background: Carbapenemase-producing Enterobacterales represent a major therapeutic challenge. MBLs, requiring zinc at their catalytic site, could be inhibited by meso-dimercaptosuccinic acid (DMSA), a heavy metal chelator already widely used for treating lead intoxication.Objectives: To evaluate the activity of carbapenems alone or combined with DMSA against MBL-producing Escherichia coli in...

Université de Fribourg

Whole-genome sequence of a colombian Acinetobacter baumannii strain, a coproducer of OXA-72 and OXA-255-like carbapenemases

Saavedra, Sandra Yamile ; Prada-Cardozo, Diego ; Rincón, Verónica ; Pérez-Cardona, Hermes ; Hidalgo, Andrea Melissa ; González, María Nilse ; Reguero, María T. ; Silva, Emilia M. Valenzuela de ; Mantilla, José R. ; Falquet, Laurent ; Barreto-Hernández, Emiliano ; Duarte, Carolina

In: Genome Announcements, 2017, vol. 5, no. 7, p. e01558-16

Colombian Acinetobacter baumannii strain ST920 was isolated from the sputum of a 68-year-old male patient. This isolate possessed blaOXA-72 and blaOXA-255-like genes. The assembled genome contained 4,104,098 pb and 38.79% G+C content. This is the first case reported of the coproduction (blaOXA-72 and blaOXA-255-like) of carbapenem-hydrolyzing class D β-lactamases (CHDLs) in Acinetobacter...

Université de Fribourg

Draft genome sequences of multidrug-resistant acinetobacter sp. strains from colombian hospitals

Barreto-Hernández, Emiliano ; Falquet, Laurent ; Reguero, María T. ; Mantilla, José R. ; Valenzuela, Emilia M. ; González, Elsa ; Cepeda, Alexandra ; Escalante, Andrea

In: Genome Announcements, 2013, vol. 1, no. 6, p. -

The draft genome sequences of the strains Acinetobacter baumannii 107m, Acinetobacter nosocomialis 28F, and Acinetobacter pittii 42F, isolated from Colombian hospitals, are reported here. These isolates are causative of nosocomial infections and are classified as multidrug resistant, as they showed resistance to four different antibiotic groups.

Université de Fribourg

Genome-based characterization of two Colombian clinical Providencia rettgeri isolates co-harboring NDM-1, VIM-2, and other β-lactamases

Piza-Buitrago, Adriana ; Rincón, Verónica ; Donato, John ; Saavedra, Sandra Yamile ; Duarte, Carolina ; Morero, Jaime ; Falquet, Laurent ; Reguero, María Teresa ; Barreto-Hernández, Emiliano

In: BMC Microbiology, 2020, vol. 20, no. 1, p. 345

Providencia rettgeri is a nosocomial pathogen associated with urinary tract infections and related to Healthcare-Associated Infection (HAI). In recent years isolates producing New Delhi Metallo-β-lactamase (NDM) and other β-lactamases have been reported that reduce the efficiency of clinical antimicrobial treatments. In this study, we analyzed antibiotic resistance, the presence of...

Université de Fribourg

High colonization rate and heterogeneity of ESBL- and carbapenemase-producing enterobacteriaceae isolated from gull feces in Lisbon, Portugal

Aires-de-Sousa, Marta ; Fournier, Claudine ; Lopes, Elizeth ; Lencastre, Hermínia de ; Nordmann, Patrice ; Poirel, Laurent

In: Microorganisms, 2020, vol. 8, no. 10, p. 1487

In order to evaluate whether seagulls living on the Lisbon coastline, Portugal, might be colonized and consequently represent potential spreaders of multidrug-resistant bacteria, a total of 88 gull fecal samples were screened for detection of extended- spectrum β-lactamase (ESBL)- or carbapenemase-producing Enterobacteriaceae for methicillin-resistant Staphylococcus aureus (MRSA) and for...

Université de Fribourg

Draft genome sequence of a blaNDM-1- and blaOXA-244-carrying multidrug-resistant Escherichia coli D-ST69 clinical isolate from Egypt

Soliman, Ahmed M. ; Ramadan, Hazem ; Sadek, Mustafa ; Nariya, Hirofumi ; Shimamoto, Toshi ; Hiott, Lari M. ; Frye, Jonathan G. ; Jackson, Charlene R. ; Shimamoto, Tadashi

In: Journal of Global Antimicrobial Resistance, 2020, vol. 22, p. 832–834

Objectives: This study describes the first draft genome sequence of a multidrug- resistant (MDR) Escherichia coli D-ST69 clinical isolate from Egypt carrying blaNDM-1 and blaOXA-244.Methods: The strain was isolated in December 2014 from a wound pus swab of a male patient in the city of Kafr El-Sheikh using MacConkey agar containing 2 μg/mL meropenem. The strain was subjected to antimicrobial ...

Université de Fribourg

Epidemiology of extended-spectrum β-lactamase-producing Enterobacteriaceae among healthcare students, at the Portuguese Red Cross Health School of Lisbon, Portugal

Fournier, Claudine ; Aires de Sousa, Marta ; Fuster Escriva, Begoña ; Sales, Leila ; Nordmanna, Patrice ; Poirel, Laurent

In: Journal of Global Antimicrobial Resistance, 2020, vol. 22, p. 733–737

Objective: The aim of the present study was to prospectively evaluate the prevalence of intestinal carriage by extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae among Portuguese students attending a Bachelors’ course in healthcare, and to determine the molecular features of ESBL-producing isolates.Methods: One-hundred and eleven faecal samples recovered from Portuguese...