Results 31 to 40 of about 1,666,677 (276)

β-Lactam induction of colanic acid gene expression inEscherichia coli [PDF]

FEMS Microbiology Letters, 2003
An unexpected observation led us to examine the relationship between beta-lactam exposure and synthesis of colonic acid capsular polysaccharide in Escherichia coli. Strains containing a cps-lacZ transcriptional fusion were challenged with antibiotics having various modes of action, and gene expression was detected by a disk-diffusion assay and in broth
Frances C, Sailer, Bernadette M, Meberg, Kevin D, Young   +2 more
openaire   +2 more sources

In vitro and in vivo activity of d-serine in combination with β-lactam antibiotics against methicillin-resistant Staphylococcus aureus

Acta Pharmaceutica Sinica B, 2019
As d-amino acids play important roles in the physiological metabolism of bacteria, combination of d-amino acids with antibiotics may provide synergistic antibacterial activity.
Qing Wang, Yuemeng Lv, Jing Pang, Xue Li, Xi Lu, Xiukun Wang, Xinxin Hu, Tongying Nie, Xinyi Yang, Yan Q. Xiong, Jiandong Jiang, Congran Li, Xuefu You   +12 more
doaj   +1 more source

Involvement of O8-antigen in altering β-lactam antibiotic susceptibilities inEscherichia coli [PDF]

FEMS Microbiology Letters, 2008
In spite of being dispensable, O-antigens are believed to facilitate various cellular processes and alter antibiotic sensitivities. Escherichia coli K-12 (CS109) strains are lacking in O-antigens and are reported to be sensitive to antibiotics. To our surprise, E. coli 2443 (expressing O8-antigen) manifested two- to fourfold higher sensitivities toward
Sujoy K, Sarkar, Anindya S, Ghosh
openaire   +2 more sources

The Lysis of Pathogenic Escherichia coli by Bacteriophages Releases Less Endotoxin Than by β-Lactams

Clinical Infectious Diseases, 2017
Summary Bacteriophages kill bacteria very rapidly. Bacteriophage-induced endotoxin release could be an issue during phage therapy. We show that bacteriophages stop cell growth more rapidly than do β-lactams, resulting in a lower endotoxin release.
N. Dufour, Raphaëlle Delattre, J. Ricard, L. Debarbieux   +3 more
semanticscholar   +1 more source

Inducible Resistance to β-Lactams in Oxacillin-Susceptible mecA1-Positive Staphylococcus sciuri Isolated From Retail Pork

Frontiers in Microbiology, 2021
Most isolated strains of Staphylococcus sciuri contain mecA1, the evolutionary origin of mecA, but are sensitive to β-lactams (OS-MRSS, oxacillin-susceptible mecA1-positive S. sciuri).
Yifei Cai, Liangjun Zheng, Yao Lu, Xu Zhao, Yanting Sun, Xingyuan Tang, Jinhe Xiao, Chen Wang, Chao Tong, Lili Zhao, Yingping Xiao, Xin Zhao, Huping Xue   +12 more
doaj   +1 more source

Detection of an IS21 insertion sequence in the mexR gene of Pseudomonas aeruginosa increasing β-lactam resistance [PDF]

FEMS Microbiology Letters, 2004
To understand the regulation of the MexAB OprM efflux system in a clinical strain of Pseudomonas aeruginosa presenting a decreased susceptibility to ticarcillin and aztreonam, the mexR repressor gene was amplified by polymerase chain reaction (PCR) and was shown to be disrupted by an insertion sequence of more than 2 kb, with characteristic direct and ...
Boutoille, David, Corvec, Stéphane, Caroff, Nathalie, Giraudeau, Cécile, Espaze, Eric, Caillon, Jocelyne, Plesiat, Patrick, Reynaud, Alain   +7 more
openaire   +2 more sources

Molecular epidemiology of Klebsiella pneumoniae resistant to beta-lactams antibiotics isolated from health centers of Aragua State-Venezuela

Kasmera, 2020
K. pneumoniae resistance to β-lactam antibiotics is a public health problem. The objective was to characterize by molecular epidemiology isolates of K.
Lisbeth Carolina Sierra, Ysvette Vasquez, Luis Perez-Ybarra, María Victoria Mendez López   +3 more
doaj   +1 more source

Characterization of the membrane sensor PenJ for β-lactam antibodies fromBacillus licheniformisby amino acid substitution [PDF]

FEMS Microbiology Letters, 1993
The PenJ protein of the penicillinase gene (penP) expression system from Bacillus licheniformis is an antirepressor and membrane receptor for beta-lactam antibiotics. A putative beta-lactam antibiotic binding site including Ser402 and Lys405, which are homologous to the conserved sequence for the beta-lactam binding site (Ser-X-X-Lys) is present.
M, Takagi, T, Ohta, S, Johki, T, Imanaka
openaire   +2 more sources

In Vitro Activity of the New β-Lactamase Inhibitors Relebactam and Vaborbactam in Combination with β-Lactams against Mycobacterium abscessus Complex Clinical Isolates

Antimicrobial Agents and Chemotherapy, 2018
Pulmonary disease due to infection with Mycobacterium abscessus complex (MABC) is notoriously difficult to treat, in large part due to the intrinsic resistance of MABC strains to most antibiotics, including β-lactams.
A. Kaushik, Nicole C. Ammerman, Jin Lee, O. Martins, B. Kreiswirth, G. Lamichhane, N. Parrish, E. Nuermberger   +7 more
semanticscholar   +1 more source

Historical Review of the Penicillin and Related Compounds (β – Lactams)

Al-Mustansiriyah Journal of Pharmaceutical Sciences, 2018
In spite of  the old age of beta lactam, they continue to provide good health and preventing human diseases by virtue of  industrial production and discoveries of small new beta-lactam group of secondary metabolite.
Luma Salman Abd
doaj   +1 more source