Imipenem antagonism of the in vitro activity of piperacillin against Pseudomonas aeruginosa.
نویسندگان
چکیده
The MICs of imipenem and piperacillin, alone and in combination, against Pseudomonas aeruginosa were determined in a checkerboard titration microdilution assay. A dramatic, one-way antagonism of imipenem for piperacillin was demonstrated in 28 of the 35 strains examined; antagonism was associated with the induction of a beta-lactamase.
منابع مشابه
Activity of ACHN-490 tested alone and in combination with other agents against Pseudomonas aeruginosa.
ACHN-490 was tested alone and in combination with cefepime, doripenem, imipenem, or piperacillin-tazobactam in a synergy time-kill analysis against 25 Pseudomonas aeruginosa strains with different resistance phenotypes. Each combination was synergistic against most isolates at 24 h, and antagonism was not observed. Combinations of ACHN-490 with cefepime, doripenem, imipenem, or piperacillin-taz...
متن کاملEffective in Vitro Synergy of Piperacillin/Tazobactam Plus either Netilmicin or Aztreonam against Metallo-β-lactamase-producing Pseudomonas Aeruginosa
This study was designed to compare the activity of piperacillin/tazobactam (TZP) in combination with either netilmicin (NET) or aztreonam (ATM) against metallo-β lactamases (MβL) Pseudomonas aeruginosa. Out of 46 nosocomial Ps. aeruginosa isolates, 38 (82.6%) isolates were carbapenem-resistant by disc diffusion susceptibility testing. These were then screened by imipenem + EDTA combined disc te...
متن کاملIn-Vitro Efficacy of Synergistic Antibiotic Combinations in Multidrug Resistant Pseudomonas Aeruginosa Strains
PURPOSE Combination antibiotic treatment is preferred in nosocomial infections caused by Pseudomonas aeruginosa (P. aeruginosa). In vitro synergism tests were used to choose the combinations which might be used in clinic. The aim of this study was to investigate the synergistic efficacy of synergistic antibiotic combinations in multidrug resistant P. aeruginosa strains. MATERIALS AND METHODS ...
متن کاملEffect of Subinhibitory concentrations of imipenem and piperacillin on transcriptional expression of algD and lasB genes in Pseudomonas aeruginosa
Sub Minimal Inhibitory concentrations (sub-MIC) of antibiotics, although not able to kill bacteria, can be effect on their physico- chemical characteristics and functions. This study aimed to investigate the effect of sub-MIC of imipenem and piperacillin on the transcriptional expression of virulence related genes algD and lasB in Pseudomonas auroginosa. Five clinical isolates of P. aeruginosa ...
متن کاملComparative in vitro activities of enoxacin (CI-919, AT-2266) and eleven antipseudomonal agents against aminoglycoside-susceptible and -resistant Pseudomonas aeruginosa strains.
The in vitro activity of enoxacin (CI 919, AT 2266), a new oral quinolone carboxylic acid compound, was compared with those of gentamicin, tobramycin, amikacin, azlocillin, piperacillin, aztreonam, moxalactam, imipenem, cefsulodin, ceftazidime, and cefoperazone against 101 aminoglycoside-susceptible and 105 aminoglycoside-resistant Pseudomonas aeruginosa strains. Among these 206 P. aeruginosa i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Antimicrobial agents and chemotherapy
دوره 26 2 شماره
صفحات -
تاریخ انتشار 1984