Results 41 to 50 of about 56,729 (249)

Identification of host genetic factors modulating β-lactam resistance in Escherichia coli harbouring plasmid-borne β-lactamase through transposon-sequencing

Emerging Microbes and Infections
Since β-lactam antibiotics are widely used, emergence of bacteria with resistance to them poses a significant threat to society. In particular, acquisition of genes encoding β-lactamase, an enzyme that degrades β-lactam antibiotics, has been a major ...
Hyunhee Kim, Travis Bell, Kihyun Lee, Jeongyun Jeong, James C. A. Bardwell, Changhan Lee   +5 more
doaj   +1 more source

Fluoroquinolones versus β-Lactam/β-Lactamase Inhibitors in Outpatients with Chronic Obstructive Pulmonary Disease and Pneumonia: A Nationwide Population-Based Study. [PDF]

PLoS ONE, 2015
Studies on the association between antibiotic treatment and outcomes in outpatients with chronic obstructive pulmonary disease (COPD) and pneumonia are scarce.
Kuan-Yin Lin, Chi-Chuan Wang, Chia-Hui Lin, Wang-Huei Sheng, Shan-Chwen Chang   +4 more
doaj   +1 more source

Stress History Establishes a Transient Tolerant State That Shapes Antibiotic Survival Upon Resuscitation

Advanced Science, EarlyView.
High‐throughput single‐cell analysis of resuscitating bacteria reveals a starvation‐history‐dependent transiently tolerant subpopulation that survives β$\beta$‐lactam exposure by temporarily reducing growth. Distinct from classical persisters, these actively growing yet dynamically modulated cells dominate survival across clinically relevant antibiotic
Kieran Abbott, Georgeos Hardo, Ruizhe Li, Jack Bradley, Ashraf Zarkan, Somenath Bakshi   +5 more
wiley   +1 more source

Activity of OP0595/β-lactam combinations against Gram-negative bacteria with extended-spectrum, AmpC and carbapenem-hydrolysing β-lactamases [PDF]

Journal of Antimicrobial Chemotherapy, 2015
OP0595 is a diazabicyclooctane that (i) acts as a PBP2-active antibacterial, (ii) inhibits Class A and C β-lactamases and (iii), like mecillinam, gives β-lactamase-independent potentiation of β-lactams targeting other PBPs. We tested its behaviour against β-lactam-resistant Enterobacteriaceae and non-fermenters.Organisms were UK clinical isolates; MICs
Livermore, David M., Mushtaq, Shazad, Warner, Marina, Woodford, Neil   +3 more
openaire   +4 more sources

Polychip‐A High‐Throughput Droplet Microfluidics Platform for Interrogating Microbial Interactions

Advanced Science, EarlyView.
Polychip, a fully integrated droplet microfluidics platform, enables high‐throughput, single‐cell resolution screening of polymicrobial interactions. By seamlessly combining six automated microfluidics operations on a single chip, the system accelerates antimicrobial discovery by 11 to 14 times compared to traditional robotic methods.
Jeong Jae Han, Adrian Ryan Guzman, Aifen Zhou, Han Zhang, Rohit Gupte, Haemin Jung, Kaylee Delgado, Sini Skariah, Ali Sultan, Arul Jayaraman, Paul de Figueiredo, Arum Han   +11 more
wiley   +1 more source

Neo-antigens for the serological diagnosis of IgE-mediated drug allergic reactions to antibiotics cephalosporin, carbapenem and monobactam

Scientific Reports, 2020
New antigens deriving from -lloyl and -llanyl, major and minor determinants, respectively, were produced for β-lactam antibiotics cefuroxime, cefotaxime, ceftriaxone, meropenem and aztreonam.
Edurne Peña-Mendizabal, Sergi Morais, Ángel Maquieira   +2 more
doaj   +1 more source

Substitution of Thr for Ala-237 in TEM-17, TEM-12 and TEM-26: alterations in β-lactam resistance conferred onEscherichia coli [PDF]

FEMS Microbiology Letters, 2001
Non-naturally occurring mutants of TEM-17 (E104K), TEM-12 (R164S) and TEM-26 (E104K:R164S) extended-spectrum (ES) beta-lactamases bearing threonine at position 237 were constructed by site-specific mutagenesis and expressed under isogenic conditions in Escherichia coli.
Giakkoupi, P., Hujer, A.M., Miriagou, V., Tzelepi, E., Bonomo, R.A., Tzouvelekis, L.S.   +5 more
openaire   +4 more sources

A Strong Lewis Acidic Diethylsilylium Catalyst for Direct Sulfonamidation of Challenging Ketones

Advanced Science, EarlyView.
Low‐substitution‐order silylium ions (R2HSi+) exhibit exceptional Lewis acidic activity. We report diethylsilylium‐catalyzed reductive sulfonamidation of functionalized ketones to access β‐amino esters. The in situ generated ion pair shows enhanced reactivity, with diethylsilane serving as both reductant and precatalyst. The developed protocol proceeds
Woo Hee Kim, Muhammad Israr, You Kyoung Chung, Shinwon Ham, Joonsuk Huh, Han Yong Bae   +5 more
wiley   +1 more source

Structural and Functional Siderophore Remodeling by Enzymatic Delipidation

Angewandte Chemie, EarlyView.
A surprising functional switch in bacterial siderophores was discovered through genome mining and the analysis of environmental and pathogenic Pandoraea species. Pandorachelin B, a lipocyclopeptide that promotes swarming motility, is cleaved by a specialized acylase, yielding a ring‐contracted, homodetic cyclopeptide, pandorachelin A, which exhibits ...
Elena Herzog, Keishi Ishida, Evelyn M. Molloy, Ron Hermenau, Kirstin Scherlach, Christian Hertweck   +5 more
wiley   +2 more sources

Comparison of initial empirical antibiotic regimens in severe community-acquired pneumonia: a network meta-analysis

BMC Pulmonary Medicine
Background Severe community-acquired pneumonia (SCAP) remains a leading cause of morbidity and mortality worldwide. Identifying the optimal antibiotic regimen for treating SCAP is crucial for improving patient outcomes.
Min Wang, Jing Zhang, Xiaoming Wang, Qian Wang, Lian Wang, Han Zhuang, Ao Liu   +6 more
doaj   +1 more source