Results 11 to 20 of about 54,914 (224)
Various Extracts of Some Medicinal Plants as Inhibitors for Beta-lactamase Activity
مجلة بغداد للعلوم, 2021 The inhibitory effect of acetone, ethanol, and aqueous extracts of ten medicinal plants on β-lactamase from Staphylococcus sciuri and Klebsiella pneumoniae was investigated in vitro by starch-iodine agar plate method.
Huda S. A. Al-Hayanni, Hamed El-Shora
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Virulence of non-β-lactamase-mediated ampicilin-resistantHaemophilus influenzae [PDF]
FEMS Microbiology Letters, 1991 We questioned whether strains of ampicillin-resistant, non-β-lactamase-producing (AmpR NBLP) Haemophilus influenae with lower affinity penicillin-binding proteins (PBPs) might have altered virulence. The virulence of resistant transformant strains and the susceptible recipient was compared using infant rats. Following intraperitoneal inoculation, there
Lorry G. Rubin +3 more
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PREVALENCE OF Β- LACTAMASE PRODUCING STAPHYLOCOCCUS AUREUS IN SLAUGHTERED [PDF]
Basrah Journal of Veterinary Research, 2008 Fifty liver and lung samples (25 for each) were examend for the presence of Staphylococcus aureus . The rate of S. aureus isolates were 60 and 56% in livers and lungs respectively. Identification of S.
Adnan M. AL- Rodhan
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LXA-1: a new plasmid-mediated β-lactamase giving low-level resistance [PDF]
FEMS Microbiology Letters, 1988 LXA-1, a novel plasmid-mediated β-lactamase, was observed in clinical isolates of Klebsiella oxytoca, Klebsiella pneumoniae, Citrobacter freundii and Enterobacter cloacae. All the strains additionally produced TEM-1 β-lactamase. LXA-1 had an Mr of 24 000 and a pI of 6.7.
Youjun Yang, G.A. Jacoby, D.M. Livermore
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Fluorescent Mesoporous Nanoparticles for β‐Lactamase Screening Assays
ChemistryOpen, 2020 We present a sensitive and rapid screening method for the determination of β‐lactamase activity of antibiotic‐resistant bacteria, by designing a pH‐sensitive fluorescent dye‐doped mesoporous silica nanoparticle encapsulated with penicillin G as a ...
Srikrishna Tummala +4 more
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Prevalence of 16S rRNA methylase genes among β-lactamase-producing Enterobacteriaceae clinical isolates in Saudi Arabia [PDF]
Libyan Journal of Medicine, 2014 Background: Co production of 16S rRNA methylases gene and β-Lactamase gene among Enterobacteriaceae isolates conferring resistance to both therapeutic options has serious implications for clinicians worldwide.
Yazeed A. Al Sheikh +4 more
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PLoS ONE, 2021 β-lactam antibiotics are the most widely used antimicrobial agents since the discovery of benzylpenicillin in the 1920s. Unfortunately, these life-saving antibiotics are vulnerable to inactivation by continuously evolving β-lactamase enzymes that are ...
Nousheen Parvaiz +4 more
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Mutation of serine residue 318 in the class C β-lactamase ofEnterobacter cloacae908R [PDF]
FEMS Microbiology Letters, 1992 The involvement of the serine residue 318 in the specificity of a class C β-lactamase was investigated. Multiple site-directed mutants at this position were generated using a polymerase chain reaction technique. These mutants were then probed for their activity towards various β-lactam compounds.
Christine Jacobs +4 more
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PLoS ONE, 2019 Chromosomal AmpC β-lactamase induction by several types of β-lactams has been reported, but not enough data are available on DHA-1 β-lactamase, a plasmid-mediated AmpC β-lactamase.
Kentaro Akata +8 more
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Isolation and preliminary characterization of β-lactamase excretory mutants ofEscherichia coliK-12 [PDF]
FEMS Microbiology Letters, 1984 Abstract Escherichia coli exc mutants able to release the plasmid pBR322-encoded β-lactamase (EC 3.5.2.6) into the extracellular medium have been isolated using a new in situ plate assay. A preliminary characterization of the exc mutants was carried out: the presence of exc mutations was associated with a specific or pleiotropic pattern of ...
Nicole Fognini-Lefebvre +1 more
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