Cryptic β-Lactamase Evolution Is Driven by Low β-Lactam Concentrations
نویسندگان
چکیده
منابع مشابه
Induction of β-Lactamase Activity and Decreased β-Lactam Susceptibility by CO2 in Clinical Bacterial Isolates
Antimicrobial susceptibility testing of clinical isolates is a crucial step toward appropriate treatment of infectious diseases. The clinical isolate Francisella philomiragia 14IUHPL001, recently isolated from a 63-year-old woman with atypical pneumonia, featured decreased susceptibility to β-lactam antibiotics when cultivated in 5% CO2. Quantitative β-lactamase assays demonstrated a significan...
متن کاملUse of β-Lactam/β-Lactamase Inhibitors for Extended-Spectrum-β-Lactamase Infections: Defining the Right Patient Population.
In a multicenter, multinational observational study that included neutropenic patients with bloodstream infections by extended-spectrum-β-lactamase-producing species, Gudiol et al. (Antimicrob. Agents Chemother. 61:e00164-17, 2017, https://doi.org/10.1128/AAC.00164-17) demonstrated that β-lactam/β-lactamase inhibitors are effective treatment options. A review of this work, however, reminds us t...
متن کاملRisk Factors for Resistance to β-Lactam/β-Lactamase Inhibitors and Ertapenem in Bacteroides Bacteremia.
The objective of this study was to determine risk factors for the development of resistance to β-lactams/β-lactamase inhibitors (βL/βLIs) and ertapenem among Bacteroides species bacteremia. We conducted a retrospective case-control study of 101 adult patients with Bacteroides species bacteremia at a 1,051-bed tertiary care medical center. The duration of exposure to βL/βLIs (odds ratio [OR], 1....
متن کاملHigh β-lactamase levels change the pharmacodynamics of β-lactam antibiotics in Pseudomonas aeruginosa biofilms.
Resistance to β-lactam antibiotics is a frequent problem in Pseudomonas aeruginosa lung infection of cystic fibrosis (CF) patients. This resistance is mainly due to the hyperproduction of chromosomally encoded β-lactamase and biofilm formation. The purpose of this study was to investigate the role of β-lactamase in the pharmacokinetics (PK) and pharmacodynamics (PD) of ceftazidime and imipenem ...
متن کاملEfficacy of β-lactam/β-lactamase inhibitor combination is linked to WhiB4-mediated changes in redox physiology of Mycobacterium tuberculosis
Mycobacterium tuberculosis (Mtb) expresses a broad-spectrum β-lactamase (BlaC) that mediates resistance to one of the highly effective antibacterials, β-lactams. Nonetheless, β-lactams showed mycobactericidal activity in combination with β-lactamase inhibitor, clavulanate (Clav). However, the mechanistic aspects of how Mtb responds to β-lactams such as Amoxicillin in combination with Clav (refe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: mSphere
سال: 2021
ISSN: 2379-5042
DOI: 10.1128/msphere.00108-21