Results 61 to 70 of about 762,836 (292)

Comparative Metagenomics and Network Analyses Provide Novel Insights Into the Scope and Distribution of β-Lactamase Homologs in the Environment

Frontiers in Microbiology, 2019
The β-lactams are the largest group of clinically applied antibiotics, and resistance to these is primarily associated with β-lactamases. There is increasing understanding that these enzymes are ubiquitous in natural environments and henceforth ...
Joao Gatica, Joao Gatica, Edouard Jurkevitch, Eddie Cytryn   +3 more
doaj   +1 more source

Broad antibiotic resistance profile of the subclass B3 metallo-β-lactamase GOB-1, a di-zinc enzyme.

, 2011
peer reviewedThe metallo-β-lactamase (MBL) GOB-1 was expressed via a T7 expression system in Escherichia coli BL21(DE3). The MBL was purified to homogeneity and shown to exhibit a broad substrate profile, hydrolyzing all the tested β-lactam compounds ...
Nathalie Selevsek, Carine Bebrone, Louise E. Horsfall, Lassaux, Patricia, Benoit M. R. Liénard, Kurt M. Hoffmann, Hoffmann, Kurt, Poirel, Laurent, Michael B. Kupper, Horsfall, Louise E., Horsfall, Louise E.; id_orcid, Bebrone, Carine, Izougarhane, Youssef, Jean-Marie Frère, Lienard, Benoit M. R., Youssef Izougarhane, Selevsek, Nathalie, Kupper, Michael B., Patricia Lassaux, Kupper, Michaël, Horsfall, Louise, Laurent Poirel, Liénard, Benoit, Galleni, Moreno, Frère, Jean-Marie, Hoffmann, Kurt M., Moreno Galleni   +26 more
core   +1 more source

Image_1_Exploring broilers and native fowls of Andaman and Nicobar Islands as a source of β-lactamase-producing Enterobacteriaceae even with limited anthropogenic activities and docking-based identification of catalytic domains in novel β-lactamase variants.JPEG

, 2023
ObjectivesThe present study was conducted to detect the occurrence of β-lactamase and biofilm-producing Escherichia coli, Salmonella, and Klebsiella in broilers and native fowl reared in the Andaman and Nicobar Islands, India.
Sneha Bhowmick (14330862), Tapan Kumar Dutta (14330880), Abhishek D. Singh (14330871), Siddhartha Narayan Joardar (14330874), Ananda Tiwari (7422383), Indranil Samanta (14330883), Surajit Pal (14330865), Kunal Batabyal (14330877), Jai Sunder (10119897), Samiran Bandyopadhyay (12880697), T. Sujatha (10119894), Tousif Mondal (14330868), Arun Kumar De (10119885)   +12 more
core   +1 more source

In vitro activity of cefiderocol against European Enterobacterales, including isolates resistant to meropenem and recentβ-lactam/β-lactamase inhibitor combinations

Microbiology Spectrum
Carbapenem-resistant Enterobacterales represent a major health threat and have few approved therapeutic options. Enterobacterales isolates were collected from hospitalized inpatients from 49 sites in six European countries (1 January–31 December 2020 ...
Anne Santerre Henriksen, Fabio Arena, Marie Attwood, Rafael Canton, Sören Gatermann, Thierry Naas, Ian Morrissey, Christopher Longshaw   +7 more
doaj   +1 more source

Normalization of Transfection Efficiency Using the β-Lactamase Gene of the pGL3 Luciferase Vector in Primary Anterior Pituitary Cells

BioTechniques, 2002
The β-galactosidase reporter gene is commonly used as a control for transfection efficiency in the promoter reporter assay system. While investigating vasoactive intestinal peptide response elements in the promoter of the prolactin gene, we found that ...
Seong W. Kang, Seungkwon You, Eric A. Wong, Mohamed E. El Halawani   +3 more
doaj   +1 more source

Expression of β-lactamase inCoxiella burnetiitransformants [PDF]

FEMS Microbiology Letters, 2000
Coxiella burnetii can be transformed to ampicillin resistance by electroporation with plasmids encoding beta-lactamase. However, non-plasmid emergence of resistance to ampicillin also develops. To validate the usefulness of the bla gene marker for selection and detection, transformed C.
M L, Suhan, H A, Thompson
openaire   +2 more sources

In vitro and in silico screening of Klebsiella pneumoniae new Delhi metallo-β-lactamase-1 inhibitors from endophytic Streptomyces spp.

, 2021
The increase in drug resistance over the last two decades is a big threat in health care settings. More importantly, the dissemination of carbapenem-resistant Enterobacteriaceae is the major threat to public health with an increase in morbidity and ...
Aathithya Diaz (11572536), Sudarshan Singh Rathore (6406109), Adithya Conjeevaram Gopal (11572539), Jayapradha Ramakrishnan (6406115), Lalitha Cheepurupalli (6406106), Vigneshwar Ramakrishnan (3388904)   +5 more
core   +1 more source

Eco‐Geography Reverses Dominant AMR Reservoirs in Klebsiella pneumoniae: Integron‐Rich Mobilomes and Cross‐Niche Connectivity

Advanced Science, EarlyView.
Dominant antimicrobial resistance reservoirs in Klebsiella pneumoniae vary across eco‐geographic settings rather than following a universal pattern. Integrated One Health and global genomic analyses show that lineage structure, integron load, and cross‐niche connectivity shape whether AMR burden accumulates primarily in human or nonhuman compartments ...
Hui Lin, Biao Tang, Hao Xu, Jiajie Qian, Feifan Shi, Junhui Zhao, Xiaorui Mao, Xiaohe Hu, Ruishan Liu, Wenhong Liu, Xiawei Jiang, Beiwen Zheng, Guoping Zhao   +12 more
wiley   +1 more source

Table_5_Increased zinc levels facilitate phenotypic detection of ceftazidime-avibactam resistance in metallo-β-lactamase-producing Gram-negative bacteria.docx

, 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-
Niels Pfennigwerth (5244080), Andreas Hiergeist (3470183), Tamara Rügamer (14155239), Axel Hamprecht (605845), Yvonne Pfeifer (457305), Sören G. Gatermann (12050073), André Gessner (821452), Michaela Simon (6587036), Roman G. Gerlach (7388399), Agnes Schröder (458932), Jonathan Jantsch (458934)   +10 more
core   +1 more source

Pathogen‐Centric Activation of an Azoreductase‐Responsive Antibody‐Antibiotic Conjugate for the Targeted Eradication of MRSA

Advanced Science, EarlyView.
A pathogen‐centric antibody‐antibiotic conjugate (AZO‐AAC) releases antibiotics via bacterial azoreductase, independent of host‐lysosomal function. This mechanism achieves nanomolar eradication of both planktonic and intracellular methicillin‐resistant Staphylococcus aureus (MRSA).
Qi Cheng, Lianqi Liu, Chenghua Liu, Fei Xie, Jingwen Dong, Xiaoyu Qin, Shunxiang Huang, Xian Li, Xingyuan Kou, Hongbin Deng, Jiannan Feng, Wu Zhong, Dian Xiao, Xinbo Zhou   +13 more
wiley   +1 more source