Results 1 to 10 of about 11,407 (210)

Ceftazidime/Avibactam Resistance in Carbapenemase-Producing Klebsiella pneumoniae [PDF]

Emerging Infectious Diseases, 2023
We identified a novel ceftazidime/avibactam resistance mechanism in sequence type 11 Klebsiella pneumoniae carbapenemase 2–producing K. pneumoniae.
Qiaozhen Cui, Chen Wang, Qichen Wang, Juanxiu Qin, Min Li, Baixing Ding, Zhen Shen   +6 more
doaj   +3 more sources

Ceftazidime-Avibactam Therapy Versus Ceftazidime-Avibactam-Based Combination Therapy in Patients With Carbapenem-Resistant Gram-Negative Pathogens: A Meta-Analysis [PDF]

Frontiers in Pharmacology, 2021
Objective: To systematically review and compare the efficacy and posttreatment resistance of ceftazidime-avibactam therapy and ceftazidime-avibactam-based combination therapy in patients with Gram-negative pathogens.Methods: PubMed, Embase, Web of ...
Dan Li, Dan Li, Dan Li, Fan Fei, Hua Yu, Xiangning Huang, Shanshan Long, Hao Zhou, Jie Zhang   +8 more
doaj   +3 more sources

KPC-33 and ompK37 mutations: Unraveling the mechanism of ceftazidime/avibactam resistance in ST11 carbapenem-resistant Klebsiella pneumoniae. [PDF]

PLoS ONE
BackgroundGlobal surveillance indicates rising ceftazidime-avibactam resistance among carbapenem-resistant Klebsiella pneumoniae (CRKP), with sequence type 11 predominating in China. The contribution of blaKPC variants and porin alterations to high-level
Shulong Zhao, Lin Ye, Shuang Song, Jingfang Sun, Jinfeng Xu, Fei Jiang, Haiquan Kang   +6 more
doaj   +2 more sources

Increased zinc levels facilitate phenotypic detection of ceftazidime-avibactam resistance in metallo-β-lactamase-producing Gram-negative bacteria [PDF]

Frontiers in Microbiology, 2022
Ceftazidime-avibactam is one of the last resort antimicrobial agents for the treatment of carbapenem-resistant, Gram-negative bacteria. Metallo-β-lactamase-producing bacteria are considered to be ceftazidime-avibactam resistant. Here, we evaluated a semi-
Michaela Simon, Michaela Simon, Roman G. Gerlach, Yvonne Pfeifer, Niels Pfennigwerth, Sören G. Gatermann, Agnes Schröder, Agnes Schröder, Andreas Hiergeist, Axel Hamprecht, Axel Hamprecht, Axel Hamprecht, Axel Hamprecht, Tamara Rügamer, André Gessner, Jonathan Jantsch, Jonathan Jantsch   +16 more
doaj   +2 more sources

Structural insights into the molecular mechanism of high-level ceftazidime–avibactam resistance conferred by CMY-185 [PDF]

mBio
β-Lactamases can accumulate stepwise mutations that increase their resistance profiles to the latest β-lactam agents. CMY-185 is a CMY-2-like β-lactamase and was identified in an Escherichia coli clinical strain isolated from a patient who underwent ...
Akito Kawai, William C. Shropshire, Masahiro Suzuki, Jovan Borjan, Samuel L. Aitken, William C. Bachman, Christi L. McElheny, Micah M. Bhatti, Ryan K. Shields, Samuel A. Shelburne, Yohei Doi   +10 more
doaj   +2 more sources

High-level ceftazidime/avibactam resistance in Escherichia coli conferred by the novel plasmid-mediated β-lactamase CMY-185 variant. [PDF]

J Antimicrob Chemother, 2023
OBJECTIVES: To characterize a blaCMY variant associated with ceftazidime/avibactam resistance from a serially collected Escherichia coli isolate. METHODS: A patient with an intra-abdominal infection due to recurrent E.
Shropshire WC, Endres BT, Borjan J, Aitken SL, Bachman WC, McElheny CL, Wu CT, Egge SL, Khan A, Miller WR, Bhatti MM, Saharasbhojane P, Kawai A, Shields RK, Shelburne SA, Doi Y.   +15 more
europepmc   +3 more sources

Within-host co-evolution of KPC variants: plasmid-mediated dissemination of blaKpc-194 and blaKpc-33 in ST11-KL64 hypervirulent Klebsiella pneumoniae driving ceftazidime-avibactam resistance [PDF]

Microbiology Spectrum
KPC variants are the primary cause of treatment failure in patients with Klebsiella pneumoniae infections. This study reports the molecular mechanism by which two novel KPC variants (KPC-194 and KPC-33), isolated from a single patient, mediate resistance
Li Ding, Xiangbing Wu, Qiang Xie, Liting Liu, Bingshao Liang, Siquan Shen, Yan Guo, Jing Chen, Fupin Hu   +8 more
doaj   +2 more sources

In-Vitro Selection of Ceftazidime/Avibactam Resistance in OXA-48-Like-Expressing Klebsiella pneumoniae: In-Vitro and In-Vivo Fitness, Genetic Basis and Activities of β-Lactam Plus Novel β-Lactamase Inhibitor or β-Lactam Enhancer Combinations

Antibiotics, 2021
Ceftazidime/avibactam uniquely demonstrates activity against both KPC and OXA-48-like carbapenemase-expressing Enterobacterales. Clinical resistance to ceftazidime/avibactam in KPC-producers was foreseen in in-vitro resistance studies.
Snehal Palwe, Yamuna Devi Bakthavatchalam, Kshama Khobragadea, Arun S. Kharat, Kamini Walia, Balaji Veeraraghavan   +5 more
doaj   +1 more source

In vitro Optimization of Ceftazidime/Avibactam for KPC-Producing Klebsiella pneumoniae

Frontiers in Microbiology, 2021
Ceftazidime/avibactam is an important treatment option for infections caused by Klebsiella pneumoniae carbapenemase-producing K. pneumoniae (KPC-Kp), however, resistance can emerge during treatment.
Yanqin Huang, Tiffany Wu, Omar Perez, Amisha P. Rana, Liang Chen, Liang Chen, Barry N. Kreiswirth, Michael J. Satlin, Zackery P. Bulman   +8 more
doaj   +1 more source

Increased gene expression and copy number of mutated bla KPC lead to high-level ceftazidime/avibactam resistance in Klebsiella pneumoniae

BMC Microbiology, 2021
Background Resistance to ceftazidime-avibactam was reported, and it is important to investigate the mechanisms of ceftazidime/avibactam resistance in K. pneumoniae with mutations in bla KPC. Results We report the mutated bla KPC is not the only mechanism
Lingxiao Sun, Haibo Li, Qi Wang, Yingmei Liu, Bin Cao   +4 more
doaj   +1 more source