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  • Title: Interaction of gentamicin, dibekacin, netilmicin and amikacin with various penicillins, cephalosporins, minocycline and new fluoro-quinolones against Enterobacteriaceae and Pseudomonas aeruginosa.
    Author: Van der Auwera P.
    Journal: J Antimicrob Chemother; 1985 Nov; 16(5):581-7. PubMed ID: 3935637.
    Abstract:
    Thirty strains of Enterobacteriaceae and ten strains of Pseudomonas aeruginosa were selected to study the in-vitro activity of various combinations containing aminoglycosides, by the checkerboard method. The following aminoglycosides: gentamicin, dibekacin, netilmicin and amikacin were used in combination with each of the following: ampicillin, ticarcillin, piperacillin, cefazolin, cefuroxime, ceftazidime, norfloxacin, enoxacin and minocycline. Synergy was not a constant feature of beta-lactam+aminoglycoside combinations. Discrepancies occurred with the same strain submitted to combinations containing different aminoglycosides. The combinations containing new quinolones+aminoglycosides were usually additive, although occasionally synergy occurred. The combination minocycline+aminoglycoside was usually additive but partial antagonism (FIC or FBC index: 1 X 5- less than 2) occurred in 10 to 40% of the strains depending on the aminoglycoside. The combinations of beta-lactams with dibekacin or netilmicin most frequently produced partial or full synergy against strains of Ps. aeruginosa susceptible to all four aminoglycosides tested.
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