Background: Metallo-β-lactamases (MBLs) have been reported in gram negative bacilli and are becoming increasingly important clinically because the enzymes hydrolyse almost all β-lactams, including carbapenems. Thus, the present study was conducted to determine the prevalence of MBL types in imipenem-nonsusceptible Pseudomonas aeruginosa and Acinetobacter baumannii isolated from a tertiary teach...

Antibiotic resistance among Gram-negative bacilli (GNB) is a rapidly expanding problem due to the organisms’ ability to mutate, and to acquire and transmit plasmids and other mobile genetic elements encoding resistance gene. Beta-lactamase antibiotics are among the most widely prescribed antibiotics worldwide and the emergence of resistance to these agents has resulted in a major clinical crisi...

The New Delhi Metallo-β-lactamase (NDM-1) was first reported in 2009 in a Swedish patient. A recent study reported that Klebsiella pneumonia NDM-1 positive strain or Escherichia coli NDM-1 positive strain was highly resistant to all antibiotics tested except tigecycline and colistin. These can no longer be relied on to treat infections and therefore, NDM-1 now becomes potentially a major global...

Background and Objectives. The aim of this study was to determine the frequency of bla NDM, bla PER, bla VEB, bla IMP, and bla VIM type genes among A. baumannii isolates from hospitalized patients in two hospitals in Tehran, Iran. Patients and Methods. Antibiotic susceptibility tests were performed by Kirby-Bauer disc diffusion and Broth microdilution methods. The frequency of MBL (metallo-beta...

The study was performed to detect the in vitro activity of tigecycline in multidrug-resistant Acinetobacter isolates from patients in Hacettepe University Adult Hospital, Turkey. The microorganisms were isolated from clinical specimens of patients with respiratory and bloodstream infections. Thirty (66.7%) of the 45 inpatients were in ICUs. In vitro activity of imipenem, meropenem, ceftazidime,...

Background: A prospective study was undertaken to detect metallo-β-lactamases (MBLs) and AmpC β-lactamases in Pseudomonas aeruginosa isolates recovered from patients at Indira Gandhi Medical College, Shimla (H.P). Objective: The study aimed at determining the prevalence of MBL and AmpC producing P. aeruginosa isolates. Material and Methods: A total of 180 isolates were preliminarily screened fo...

In this study, we have evaluated the efficacy of calcium-EDTA (Ca-EDTA) as an inhibitor of bacterial metalloenzymes, such as metallo-β-lactamase (MBL) and other proteases, in a mouse model of Pseudomonas aeruginosa pneumonia. The simultaneous presence of Ca-EDTA (32 μg/ml) reduced the MICs of imipenem (IPM) in all MBL-producing P. aeruginosa isolates (IMP-1, -2, -7, and -10 and VIM-2) but not n...

Diffuse large B cell lymphoma (DLBCL) is a clinically and genetically heterogeneous disease. A small subset of DLBCLs has translocations involving the MYC locus and an additional group has a molecular signature resembling Burkitt lymphoma (mBL). Presently, identification of such cases by morphology is unreliable and relies on cytogenetic or complex molecular methods such as gene transcriptional...

The ethylmalonic encephalopathy protein 1 (ETHE1) catalyses the oxygen-dependent oxidation of glutathione persulfide (GSSH) to give persulfite and glutathione. Mutations to the hETHE1 gene compromise sulfide metabolism leading to the genetic disease ethylmalonic encephalopathy. hETHE1 is a mono-iron binding member of the metallo-β-lactamase (MBL) fold superfamily. We report crystallographic ana...

BACKGROUND Although the mechanisms underlying the causes of heavy menstrual blood loss (MBL) remain to be elucidated, prostaglandins have been previously implicated. This study was initiated to elucidate a pattern of expression of the various components of the cyclooxygenase (COX)-prostaglandin signalling pathways present in the endometrium of women with normal and heavy MBLs. METHODS Endomet...