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carbapenemase

  • Simple Phenotypic Tests To Improve Accuracy in Screening Chromosomal and Plasmid-Mediated Colistin Resistance in Gram-Negative Bacilli
    Bacteriology
    Simple Phenotypic Tests To Improve Accuracy in Screening Chromosomal and Plasmid-Mediated Colistin Resistance in Gram-Negative Bacilli

    CLSI and EUCAST recommend that only broth microdilution (BMD) should be used for routine colistin susceptibility testing; however, this technique can be difficult to perform in resource-poor settings. The purpose of this study was to evaluate the accuracy of a colistin agar spot test (COL-AS) and a colistin drop test (COL-DT) compared to BMD. COL-AS and COL-DT were assessed with a collection of 271 Gram-negative bacilli clinical...

    Fernando Pasteran, Diego Danze, Alejandra Menocal, Carla Cabrera, Ignacio Castillo, Ezequiel Albornoz, Celeste Lucero, Melina Rapoport, Paola Ceriana, Alejandra Corso
  • Evaluation of the Xpert Carba-R NxG Assay for Detection of Carbapenemase Genes in a Global Challenge Set of <span class="named-content genus-species" id="named-content-1">Pseudomonas aeruginosa</span> Isolates
    Bacteriology
    Evaluation of the Xpert Carba-R NxG Assay for Detection of Carbapenemase Genes in a Global Challenge Set of Pseudomonas aeruginosa Isolates

    The growing prevalence and diversity of carbapenemase producers among carbapenem-resistant Pseudomonas aeruginosa (CRPA) isolates warrants an expansion of detection capabilities. The purpose of this study was to evaluate the performance of the commercially available Xpert Carba-R (Carba-R) and the research-use-only Xpert Carba-R NxG (Carba-R NxG) in a global...

    Christian M. Gill, Tomefa E. Asempa, Isabella A. Tickler, Caitlin dela Cruz, Fred C. Tenover, David P. Nicolau
  • Rapid Detection and Characterization of Carbapenemases in <em>Enterobacterales</em> with a New Modified Carbapenem Inactivation Method, mCIMplus
    Bacteriology
    Rapid Detection and Characterization of Carbapenemases in Enterobacterales with a New Modified Carbapenem Inactivation Method, mCIMplus

    The worldwide emergence and spread of antimicrobial resistance in Gram-negative bacteria are severely limiting therapeutic options and thus constitute a major public health threat. The timely accurate detection of carbapenemase producers and the determination of carbapenemase class according to the Ambler classification can guide antimicrobial therapy and facilitate infection control measures. A modified version of the carbapenemase...

    Morgane Petit, François Caméléna, Aurélie Cointe, Thibaut Poncin, Manel Merimèche, Stéphane Bonacorsi, André Birgy, Béatrice Berçot
  • Open Access
    Clinical and Genomic Epidemiology of Carbapenem-Nonsusceptible <em>Citrobacter</em> spp. at a Tertiary Health Care Center over 2 Decades
    Epidemiology
    Clinical and Genomic Epidemiology of Carbapenem-Nonsusceptible Citrobacter spp. at a Tertiary Health Care Center over 2 Decades

    Carbapenem-nonsusceptible Citrobacter spp. (CNSC) are increasingly recognized as health care-associated pathogens. Information regarding their clinical epidemiology, genetic diversity, and mechanisms of carbapenem resistance is lacking. We examined microbiology records of adult patients at the University of Pittsburgh Medical Center (UMPC) Presbyterian Hospital (PUH) from 2000 to 2018 for CNSC, as defined by ertapenem...

    Ahmed Babiker, Daniel R. Evans, Marissa P. Griffith, Christi L. McElheny, Mohamed Hassan, Lloyd G. Clarke, Roberta T. Mettus, Lee H. Harrison, Yohei Doi, Ryan K. Shields, Daria Van Tyne
  • NitroSpeed-Carba NP Test for Rapid Detection and Differentiation between Different Classes of Carbapenemases in <em>Enterobacterales</em>
    Bacteriology
    NitroSpeed-Carba NP Test for Rapid Detection and Differentiation between Different Classes of Carbapenemases in Enterobacterales

    A biochemical test (NitroSpeed-Carba NP test) was developed to identify carbapenemase production in Enterobacterales and to discriminate between the different types of clinically significant carbapenemases (Ambler classes A, B, and D). It is based on two main features, namely, the hydrolysis by all β-lactamases, including carbapenemases of the nitrocefin substrate, and the capacity of ertapenem to prevent this hydrolysis for...

    Patrice Nordmann, Mustafa Sadek, Anthony Demord, Laurent Poirel
  • Evaluation of NG-Test Carba 5 for Rapid Phenotypic Detection and Differentiation of Five Common Carbapenemase Families: Results of a Multicenter Clinical Evaluation
    Bacteriology
    Evaluation of NG-Test Carba 5 for Rapid Phenotypic Detection and Differentiation of Five Common Carbapenemase Families: Results of a Multicenter Clinical Evaluation

    NG-Test Carba 5 is a rapid in vitro multiplex immunoassay for the phenotypic detection and differentiation of five common carbapenemase families (KPC, OXA-48-like, VIM, IMP, and NDM) directly from bacterial colonies. The assay is simple to perform and has recently received U.S. Food and Drug Administration clearance. A method comparison study was performed at geographically diverse medical centers (n = 3) in the United...

    Stephen Jenkins, Nathan A. Ledeboer, Lars F. Westblade, Carey-Ann D. Burnham, Matthew L. Faron, Yehudit Bergman, Rebecca Yee, Brian Mesich, Derek Gerstbrein, Meghan A. Wallace, Amy Robertson, Kathy A. Fauntleroy, Anna S. Klavins, Rianna Malherbe, Andre Hsiung, Patricia J. Simner
  • Evaluation of the EDTA-Modified Carbapenem Inactivation Method for Detecting Metallo-β-Lactamase-Producing <em>Pseudomonas aeruginosa</em>
    Bacteriology
    Evaluation of the EDTA-Modified Carbapenem Inactivation Method for Detecting Metallo-β-Lactamase-Producing Pseudomonas aeruginosa

    The prevalence of carbapenem-resistant Pseudomonas aeruginosa is increasing. Identification of carbapenemase-producing P. aeruginosa will have therapeutic, epidemiological, and infection control implications. This study evaluated the performance of the EDTA-modified carbapenem inactivation method (...

    Christian M. Gill, Maxwell J. Lasko, Tomefa E. Asempa, David P. Nicolau
  • Validation of Aztreonam-Avibactam Susceptibility Testing Using Digitally Dispensed Custom Panels
    Bacteriology
    Validation of Aztreonam-Avibactam Susceptibility Testing Using Digitally Dispensed Custom Panels

    Aztreonam-avibactam is a combination antimicrobial agent with activity against carbapenemase-producing Enterobacteriaceae (CPE) with metallo-β-lactamases (MβLs). Although aztreonam-avibactam is not yet approved by the U.S. Food and Drug Administration (FDA), clinicians can administer this combination by using two FDA-approved drugs: aztreonam and ceftazidime-avibactam. This combination of drugs is recommended by multiple...

    Eric Ransom, Amelia Bhatnagar, Jean B. Patel, Maria-Jose Machado, Sandra Boyd, Natashia Reese, Joseph D. Lutgring, David Lonsway, Karen Anderson, Allison C. Brown, Christopher A. Elkins, J. Kamile Rasheed, Maria Karlsson
  • Free
    The Brief Case: IMP, the Uncommonly Common Carbapenemase
    The Brief Case
    The Brief Case: IMP, the Uncommonly Common Carbapenemase
    Christopher F. Lowe, Nancy Matic, Sylvie Champagne, Marc G. Romney, Victor Leung, Gordon Ritchie
  • Free
    Closing the Brief Case: IMP, the Uncommonly Common Carbapenemase
    The Brief Case
    Closing the Brief Case: IMP, the Uncommonly Common Carbapenemase
    Christopher F. Lowe, Nancy Matic, Sylvie Champagne, Marc G. Romney, Victor Leung, Gordon Ritchie

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