In vitro evaluation of BRL 42715, a novel beta-lactamase inhibitor
نویسندگان
چکیده
منابع مشابه
In vitro activity of temocillin (BRL 17421), a novel beta-lactamase-stable penicillin.
The new in vitro activity of temocillin (BRL 17421), a new beta-lactamase-stable penicillin, was compared with those of other beta-lactam antibiotics for over 500 clinical bacterial isolates. Temocillin inhibited 94% of the Enterobacteriaceae organisms at concentrations of 0.5 to 8 microgram/ml, regardless of organisms resistance to ampicillin, ticarcillin, cefazolin, or combinations thereof. M...
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LK-157 is a novel tricyclic carbapenem with potent activity against class A and class C beta-lactamases. When tested against the purified TEM-1 and SHV-1 enzymes, LK-157 exhibited 50% inhibitory concentrations (IC(50)s) in the ranges of the clavulanic acid and tazobactam IC(50)s (55 nM and 151 nM, respectively). Moreover, LK-157 significantly inhibited AmpC beta-lactamase (IC(50), 62 nM), as LK...
متن کاملKinetic study of interaction between BRL 42715, beta-lactamases, and D-alanyl-D-alanine peptidases.
A detailed kinetic study of the interactions between BRL 42715, a beta-lactamase-inhibiting penem, and various beta-lactamases (EC 3.5.2.6) and D-alanyl-D-alanine peptidases (DD-peptidases, EC 3.4.16.4) is presented. The compound was a very efficient inactivator of all active-site serine beta-lactamases but was hydrolyzed by the class B, Zn(2+)-containing enzymes, with very different kcat value...
متن کاملSusceptibilities of 540 anaerobic gram-negative bacilli to amoxicillin, amoxicillin-BRL 42715, amoxicillin-clavulanate, temafloxacin, and clindamycin.
Agar dilution MIC testing of amoxicillin, amoxicillin-BRL 42715, amoxicillin-clavulanate, temafloxacin, and clindamycin against 496 beta-lactamase-producing anaerobic gram-negative rods revealed MICs for 90% of the strains tested of 256.0 (amoxicillin), 2.0 (amoxicillin-BRL 42715 and amoxicillin-clavulanate), and 4.0 (temafloxacin and clindamycin) microgram/ml. Amoxicillin, temafloxacin, and cl...
متن کاملComparative in vitro activity of beta-lactam/beta-lactamase inhibitor combinations against gram negative bacteria.
BACKGROUND & OBJECTIVE Currently, the use of beta-lactamase inhibitors in combination with beta-lactam antibiotics represents an effective measure to combat a specific resistance mechanism of beta-lactamase producing organisms. Knowledge about the susceptibility profile of bacteria to different combination agents available is essential to guide appropriate treatment of severe infections in hosp...
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ژورنال
عنوان ژورنال: Antimicrobial Agents and Chemotherapy
سال: 1989
ISSN: 0066-4804,1098-6596
DOI: 10.1128/aac.33.9.1580