Article
Immunology
Wei Yu, Luying Xiong, Qixia Luo, Yunbo Chen, Jinru Ji, Chaoqun Ying, Zhiying Liu, Yonghong Xiao
Summary: The study found that in vitro activity of aztreonam-avibactam was superior to ceftazidime-avibactam against carbapenem-resistant Escherichia coli and Klebsiella pneumoniae, while ceftazidime-avibactam showed better effect against carbapenem-resistant Pseudomonas aeruginosa.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2021)
Article
Microbiology
Naphat Satapoomin, Punyawee Dulyayangkul, Matthew B. Avison
Summary: The study reveals a variant of Klebsiella pneumoniae that exhibits resistance to multiple antibiotics, including ceftazidime-avibactam and meropenem-vaborbactam. Further mutations and enzyme production are required for resistance to other antibiotics.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2022)
Article
Infectious Diseases
Shan Sun, Kai Chen, Xuehua Kong, Wenjun Tian, Siqiang Niu
Summary: This study provides a comprehensive understanding of the distribution characteristics of carbapenemase genes and the antimicrobial activities of ATM/AVI and CAZ/AVI against CRE isolates in Chongqing, China.
INFECTION AND DRUG RESISTANCE
(2022)
Article
Infectious Diseases
Hakeam A. Hakeam, Hala Alsahli, Lama Albabtain, Shahad Alassaf, Zainab Al Duhailib, Sahar Althawadi
Summary: In patients with CRE bacteremia, ceftazidime-avibactam was associated with a lower risk of 14-day mortality compared to colistin, and had a higher clinical success rate.
INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES
(2021)
Article
Infectious Diseases
Papa-Ezdra Romina, Araujo Lucia, Caiata Leticia, Ferreira Federica, Avila Pablo, Seija Veronica, Galiana Antonio, Bado Ines, Vignoli Rafael
Summary: This work describes the in vitro performance of the combined activity of ceftazidime-avibactam and aztreonam against carbapenemase-producing Enterobacterales. The study shows that the combination of ceftazidime-avibactam and aztreonam has a synergistic effect.
JOURNAL OF GLOBAL ANTIMICROBIAL RESISTANCE
(2023)
Article
Infectious Diseases
Karoline Knudsen List, Mette Kolpen, Kasper Norskov Kragh, Godefroid Charbon, Stine Radmer, Frank Hansen, Anders Lobner-Olesen, Niels Frimodt-Moller, Frederik Boetius Hertz
Summary: The study evaluated the efficacy of mecillinam in combination with either avibactam or ceftazidime/avibactam against carbapenemase-producing clinical isolates. The combination substantially reduced MICs and showed significant log-CFU reductions in time-kill and in vivo experiments, indicating a notable effect on most types of CPEs, both in vitro and in vivo.
Article
Infectious Diseases
Jie Gu, Jie Xu, Ting-ting Zuo, Yan-bin Chen
Summary: This study evaluated the efficacy of ceftazidime-avibactam (CAZ-AVI) in treating carbapenem-resistant Klebsiella pneumoniae (CR-KP) infections. Results showed that CAZ-AVI treatment was associated with significantly lower 30-day mortality, 14-day clinical failure, and 14-day microbiological failure rates compared to other active antibiotics. Subgroup analysis further supported the beneficial effects of CAZ-AVI in reducing mortality in specific patient populations.
JOURNAL OF GLOBAL ANTIMICROBIAL RESISTANCE
(2021)
Article
Infectious Diseases
Vincenzo Di Pilato, Luigi Principe, Lilia Andriani, Noemi Aiezza, Marco Coppi, Silvia Ricci, Tommaso Giani, Francesco Luzzaro, Gian Maria Rossolini
Summary: This article reports an outbreak caused by carbapenemase-producing Klebsiella pneumoniae that is resistant to ceftazidime/avibactam and variably resistant to carbapenem-based beta-lactam/beta-lactamase inhibitor combinations. The overproduction of KPC-3 was identified as the main mechanism of cross-resistance to ceftazidime/avibactam and meropenem/vaborbactam, while resistance to imipenem/relebactam was less affected.
CLINICAL MICROBIOLOGY AND INFECTION
(2023)
Article
Microbiology
Carmen Antonia Sanches Ito, Larissa Bail, Lavinia Nery Villa Stangler Arend, Kleber Oliveira Silva, Simone Sebold Michelotto, Keite da Silva Nogueira, Felipe Francisco Tuon
Summary: The study evaluated the performance of a new MicroScan Neg multidrug-resistant MIC 1 (NMR1) panel for clinical carbapenem-nonsusceptible Gram-negative bacilli isolates, demonstrating high reliability in detecting ceftazidime-avibactam and ceftolozane-tazobactam. The panel is a viable option for clinical applications, especially for KPC-producing Enterobacterales and carbapenem-nonsusceptible P. aeruginosa.
JOURNAL OF CLINICAL MICROBIOLOGY
(2021)
Article
Immunology
Wen Wang, Shifeng Huang, Chunhong Zou, Yanhui Ding, Huijuan Wang, Shuli Pu, Yunfeng Liao, Hong Du, Deqiang Wang, Liang Chen, Siqiang Niu
Summary: The study demonstrated that AUR enhanced the activity of ATM-AVI against MBL-producing isolates and restored the susceptibility of ATM-AVI resistant mutant strains.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2021)
Article
Infectious Diseases
Ke Ma, Yu Feng, Zhiyong Zong
Summary: Aztreonam/avibactam has additional coverage for metallo-beta-lactamases compared with ceftazidime/avibactam, but some strains may develop resistance to aztreonam/avibactam while remaining susceptible to ceftazidime/avibactam.
INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS
(2022)
Article
Infectious Diseases
Amelia Bhatnagar, Eric M. Ransom, Maria-Jose Machado, Sandra Boyd, Natashia Reese, Karen Anderson, David Lonsway, Christopher A. Elkins, J. Kamile Rasheed, Jean B. Patel, Maria Karlsson, Allison C. Brown, Joseph D. Lutgring
Summary: This study aimed to determine whether increasing ceftazidime concentrations affect the MICs of aztreonam/avibactam. Testing on 37 Enterobacteriales isolates with intermediate or resistant interpretations to aztreonam and ceftazidime/avibactam showed that ceftazidime did not affect the in vitro activity of aztreonam/avibactam in the combination.
JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY
(2021)
Review
Infectious Diseases
Jinglan Chen, Qin Hu, Pengxiang Zhou, Sheng Deng
Summary: Compared to polymyxin, ceftazidime-avibactam demonstrated superior clinical efficacy in the treatment of carbapenem-resistant Enterobacteriaceae (CRE) infections.
Article
Microbiology
Christian M. Gill, Elif Aktas, Wadha Alfouzan, Lori Bourassa, Adrian Brink, Carey-Ann D. Burnham, Rafael Canton, Yehuda Carmeli, Marco Falcone, Carlos Kiffer, Anna Marchese, Octavio Martinez, Spyros Pournaras, Harald Seifert, Abrar K. Thabit, Maria Virginia Villegas, Lars F. Westblade, David P. Nicolau
Summary: In this study, high in vitro potency of ceftazidime and cefepime among carbapenem-resistant Pseudomonas aeruginosa isolates was found, with 6 g/day required to achieve optimal pharmacodynamic profiles. These findings should be considered in the clinical setting and for the application of CLSI susceptibility breakpoints.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2021)
Review
Microbiology
Claire Amaris Hobson, Gautier Pierrat, Olivier Tenaillon, Stephane Bonacorsi, Beatrice Bercot, Ella Jaouen, Herve Jacquier, Andre Birgy
Summary: This review describes the mutational landscape of KPC beta-lactamase towards ceftazidime-avibactam resistance, showing that resistance is associated with three hot spots and a high representation of insertions and deletions compared to other beta-lactamases. The extension of resistance to ceftazidime-avibactam is accompanied by a trade-off in resistance to other beta-lactams and a decrease in enzyme stability. The natural stability of KPC could explain its propensity to acquire in vivo mutations conferring resistance to ceftazidime-avibactam.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2022)