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Acinetobacter baumannii

  • Minocycline Alone and in Combination with Polymyxin B, Meropenem, and Sulbactam against Carbapenem-Susceptible and -Resistant <span class="named-content genus-species" id="named-content-1">Acinetobacter baumannii</span> in an <em>In Vitro</em> Pharmacodynamic Model
    Pharmacology
    Minocycline Alone and in Combination with Polymyxin B, Meropenem, and Sulbactam against Carbapenem-Susceptible and -Resistant Acinetobacter baumannii in an In Vitro Pharmacodynamic Model

    Acinetobacter baumannii is recognized as an urgent public health threat by the Centers for Disease Control and Prevention (CDC). Current treatment options are scarce, particularly against carbapenem-resistant Acinetobacter baumannii (CRAB).

    Maya Beganovic, Kathryn E. Daffinee, Megan K. Luther, Kerry L. LaPlante
  • <em>In Vitro</em> Activity of Cefepime-Zidebactam, Ceftazidime-Avibactam, and Other Comparators against Clinical Isolates of <em>Enterobacterales</em>, <span class="named-content genus-species" id="named-content-1">Pseudomonas aeruginosa</span>, and <span class="named-content genus-species" id="named-content-2">Acinetobacter baumannii</span>: Results from China Antimicrobial Surveillance Network (CHINET) in 2018
    Susceptibility
    In Vitro Activity of Cefepime-Zidebactam, Ceftazidime-Avibactam, and Other Comparators against Clinical Isolates of Enterobacterales, Pseudomonas aeruginosa, and Acinetobacter baumannii: Results from China Antimicrobial Surveillance Network (CHINET) in 2018

    This study evaluated the in vitro activity of cefepime-zidebactam in comparison with that of ceftazidime-avibactam and other comparators against clinically significant Gram-negative bacillus isolates. A total of 3,400 nonduplicate Gram-negative clinical isolates were collected from 45 medical centers across China in the CHINET Program in 2018, including Enterobacterales (n = 2,228),...

    Yang Yang, Yan Guo, Dandan Yin, Yonggui Zheng, Shi Wu, Demei Zhu, Fupin Hu
    and on behalf of the China Antimicrobial Surveillance Network (CHINET) Study Group
  • Open Access
    <em>In Vitro</em> Activity of Cefiderocol, a Siderophore Cephalosporin, against Multidrug-Resistant Gram-Negative Bacteria
    Susceptibility
    In Vitro Activity of Cefiderocol, a Siderophore Cephalosporin, against Multidrug-Resistant Gram-Negative Bacteria

    Cefiderocol is a parenteral siderophore cephalosporin with a catechol-containing 3′ substituent. We evaluated its MICs against Gram-negative bacteria, using iron-depleted Mueller-Hinton broth. The panel comprised 305 isolates of Enterobacterales, 111 of Pseudomonas aeruginosa, and 99 of ...

    Shazad Mushtaq, Zahra Sadouki, Anna Vickers, David M. Livermore, Neil Woodford
  • Open Access
    Structural Insights into Inhibition of the <span class="named-content genus-species" id="named-content-1">Acinetobacter</span>-Derived Cephalosporinase ADC-7 by Ceftazidime and Its Boronic Acid Transition State Analog
    Mechanisms of Resistance
    Structural Insights into Inhibition of the Acinetobacter-Derived Cephalosporinase ADC-7 by Ceftazidime and Its Boronic Acid Transition State Analog

    Extended-spectrum class C β-lactamases have evolved to rapidly inactivate expanded-spectrum cephalosporins, a class of antibiotics designed to be resistant to hydrolysis by β-lactamase enzymes. To better understand the mechanism by which Acinetobacter-derived cephalosporinase-...

    Brandy N. Curtis, Kali A. Smolen, Sara J. Barlow, Emilia Caselli, Fabio Prati, Magdalena A. Taracila, Robert A. Bonomo, Bradley J. Wallar, Rachel A. Powers
  • Open Access
    Activities of Cefiderocol with Simulated Human Plasma Concentrations against Carbapenem-Resistant Gram-Negative Bacilli in an <em>In Vitro</em> Chemostat Model
    Pharmacology
    Activities of Cefiderocol with Simulated Human Plasma Concentrations against Carbapenem-Resistant Gram-Negative Bacilli in an In Vitro Chemostat Model

    Activities of cefiderocol under simulated human plasma concentrations at the recommended dosing regimen of 2 g every 8 h with a 3-h infusion were evaluated using an in vitro chemostat model. Against a total of 6 meropenem-resistant Gram-negative strains with cefiderocol MICs of 0.5 to 4 μg/ml, including metallo-β-lactamase producers and carbapenem-resistant ...

    Shuhei Matsumoto, Sachi Kanazawa, Takafumi Sato, Yoshinori Yamano
  • Open Access
    A Diverse Panel of Clinical <span class="named-content genus-species" id="named-content-1">Acinetobacter baumannii</span> for Research and Development
    Editor's Pick Epidemiology and Surveillance
    A Diverse Panel of Clinical Acinetobacter baumannii for Research and Development

    Over the past two decades, Acinetobacter baumannii has emerged as a leading cause of nosocomial infections worldwide. Of particular concern are panresistant strains, leading the World Health Organization (WHO) to designate carbapenem-resistant A. baumannii as a priority 1 (critical) pathogen for...

    Madeline R. Galac, Erik Snesrud, Francois Lebreton, Jason Stam, Michael Julius, Ana C. Ong, Rosslyn Maybank, Anthony R. Jones, Yoon I. Kwak, Kate Hinkle, Paige E. Waterman, Emil P. Lesho, Jason W. Bennett, Patrick Mc Gann
  • Open Access
    Scarless Removal of Large Resistance Island AbaR Results in Antibiotic Susceptibility and Increased Natural Transformability in <span class="named-content genus-species" id="named-content-1">Acinetobacter baumannii</span>
    Mechanisms of Resistance
    Scarless Removal of Large Resistance Island AbaR Results in Antibiotic Susceptibility and Increased Natural Transformability in Acinetobacter baumannii

    With a great diversity in gene composition, including multiple putative antibiotic resistance genes, AbaR islands are potential contributors to multidrug resistance in Acinetobacter baumannii. However, the effective contribution of AbaR to antibiotic resistance and bacterial physiology remains elusive. To address this, we sought to accurately remove AbaR islands and...

    Anne-Sophie Godeux, Elin Svedholm, Agnese Lupo, Marisa Haenni, Samuel Venner, Maria-Halima Laaberki, Xavier Charpentier
  • Preserving Vascular Integrity Protects Mice against Multidrug-Resistant Gram-Negative Bacterial Infection
    Editor's Pick Experimental Therapeutics
    Preserving Vascular Integrity Protects Mice against Multidrug-Resistant Gram-Negative Bacterial Infection

    The rise in multidrug-resistant (MDR) organisms portends a serious global threat to the health care system with nearly untreatable infectious diseases, including pneumonia and its often fatal sequelae, acute respiratory distress syndrome (ARDS) and sepsis. Gram-negative bacteria (GNB), including Acinetobacter baumannii,...

    Teclegiorgis Gebremariam, Lina Zhang, Sondus Alkhazraji, Yiyou Gu, Eman G. Youssef, Zongzhong Tong, Erik Kish-Trier, Ashok Bajji, Claudia V. de Araujo, Bianca Rich, Samuel W. French, Dean Y. Li, Alan L. Mueller, Shannon J. Odelberg, Weiquan Zhu, Ashraf S. Ibrahim
  • Distinct Mechanisms of Dissemination of NDM-1 Metallo-β-Lactamase in <em>Acinetobacter</em> Species in Argentina
    Epidemiology and Surveillance
    Distinct Mechanisms of Dissemination of NDM-1 Metallo-β-Lactamase in Acinetobacter Species in Argentina

    A 4-year surveillance of carbapenem-resistant Acinetobacter spp. isolates in Argentina identified 40 strains carrying blaNDM-1. Genome sequencing revealed that most were Acinetobacter baumannii, whereas seven represented other Acinetobacter spp. The A. baumannii...

    Mark D. Adams, Fernando Pasteran, German M. Traglia, Jasmine Martinez, Fanny Huang, Christine Liu, Jennifer S. Fernandez, Carolina Lopez, Lisandro J. Gonzalez, Ezequiel Albornoz, Alejandra Corso, Alejandro J. Vila, Robert A. Bonomo, Maria Soledad Ramirez
  • Pharmacodynamics of Meropenem against <span class="named-content genus-species" id="named-content-1">Acinetobacter baumannii</span> in a Neutropenic Mouse Thigh Infection Model
    Pharmacology
    Pharmacodynamics of Meropenem against Acinetobacter baumannii in a Neutropenic Mouse Thigh Infection Model

    Acinetobacter baumannii infections are difficult to treat and have limited treatment options. Carbapenems, including meropenem, are currently considered the first-line agents for the treatment of infections caused by Acinetobacter spp. The percentage of a 24-hour period that the concentration of...

    Mojgan Sabet, Ziad Tarazi, David C. Griffith

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