In vitro activity of fosfomycin combined with rifampin, pefloxacin and imipenem against staphylococci: a study by the time-kill curve method.
The in vitro activity of fosfomycin alone and in combination with rifampin, pefloxacin and imipenem was studied by the time-kill method against staphylococci. Fosfomycin, pefloxacin and imipenem used at concentrations within the therapeutic range, exerted a bactericidal effect, whereas rifampin acted as a bacteriostatic drug. The combination of fosfomycin and rifampin was found to be antagonistic against rifampin-susceptible strains and indifferent for rifampin-resistant isolates. Fosfomycin combined with pefloxacin usually produced an indifferent effect. The interaction between fosfomycin and imipenem was mainly indifferent but synergism occurred with methicillin-resistant strains and antagonism was observed for one methicillin-susceptible isolate of Staphylococcus aureus.
D000900:Anti-Bacterial Agents / Q000494:pharmacology; D004336:Drug Antagonism; D004347:Drug Interactions; D004357:Drug Synergism; D005578:Fosfomycin / Q000494:pharmacology*; D015378:Imipenem; D008826:Microbial Sensitivity Tests; D009643:Norfloxacin / Q000031:analogs & derivatives* / Q000494:pharmacology; D015366:Pefloxacin; D012293:Rifampin / Q000494:pharmacology*; D013210:Staphylococcus / Q000187:drug effects*; D013211:Staphylococcus aureus / Q000187:drug effects; D013212:Staphylococcus epidermidis / Q000187:drug effects; D013845:Thienamycins / Q000494:pharmacology*
D000900:Anti-Bacterial Agents; D013845:Thienamycins; D015366:Pefloxacin; D005578:Fosfomycin; D015378:Imipenem; D009643:Norfloxacin; D012293:Rifampin