In recent years, Enterobacteriaceae isolates have increased their potential to become highly drug resistant by acquiring resistance to carbapenems, primarily due to the production of acquired carbapenemases. The carbapenemases detected in Enterobacteriaceae are largely of the KPC, VIM, NDM, IMP and OXA-48 types. Although the epidemiological origin and geographic distribution of carbapenemases a...

To further elucidate the induction process of the carbapenem-hydrolyzing beta-lactamase of Ambler class A, NmcA, ampD genes of the wild-type (WT) strain and of ceftazidime-resistant mutants of Enterobacter cloacae NOR-1 were cloned and tested in transcomplementation experiments. Ceftazidime-resistant E. cloacae NOR-1 mutants exhibited derepressed expression of the AmpC-type cephalosporinase and...

Untreated wastewater, particularly from hospitals and other healthcare facilities, is considered to be a reservoir for multidrug-resistant bacteria. However, its role in the spread of antibiotic resistances in the human population remains poorly investigated. We used whole genome sequencing to analyze 25 KPC-2-producing Enterobacteriaceae isolates from sewage water collected during a 3-year per...

Fluoroquinolone (FQ) agents are a potential resort to treat infection due to Enterobacteriaceae producing extended spectrum β-lactamase and susceptible to FQ. In a context of increase of non-susceptibility to carbapenems among Enterobacteriaceae, we characterized FQ resistance mechanisms in 75 Enterobacter cloacae isolates non-susceptible to ertapenem in North-Eastern France in 2012 and describ...

Carbapenem resistance was studied in a clinical isolate of Enterobacter cloacae, strain 201 (MIC of imipenem and meropenem, 16 micrograms/ml). This strain was analyzed comparatively with the carbapenem-susceptible parent strain 200, an equally susceptible revertant, 201-Rev, and in vitro-selected mutants with different levels of carbapenem resistance. All strains produced similarly high amounts...

The paper reports on the emergence of strain in which Enterobacter cloacae has demonstrated an unusual form of resistance to carbapenems mediated by enzyme IMI-1, class A beta-lactamase. The strain was isolated from a wound swab in the patient who had a surgical wound infection previously treated with meropenem. Limited choice of antibiotics that can treat infections caused by these pathogens i...

Results: Out of 200 clinical wound specimens processed, Staphylococcus aureus was the most common bacterial pathogen isolated (n=100, 50%), followed by Escherichia coli (n=45, 22.5%), Pseudomonas aeruginosa (n=35, 17.5%), Enterobacter species (n=14, 7%), Proteus species (n=5, 2.5%) and Morganella species (n=1, 0.5%). Staphylococcus aureus (n=100) showed highest resistance to amoxicillin (82%), ...

BACKGROUND Antimicrobial resistance is a serious problem that compromises the empirical treatment of infections, resulting in a lack of effective antibiotics and high medical expenses. Here, we aimed to monitor the trends in antimicrobial resistance among Enterobacteriaceae isolated from blood samples in mainland China. METHODS A total of 2240 Enterobacteriaceae isolates from blood were colle...

OBJECTIVES The aim of this study was to investigate relatedness and molecular mechanism(s) of ertapenem resistance in clinical isolates of Klebsiella spp. (n = 28) and Enterobacter spp. (n = 27) referred from multiple hospitals to the UK national reference laboratory. METHODS Investigations included genotyping by PFGE, resistance gene analysis by PCR and antimicrobial susceptibility testing w...