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- W2000238889 abstract "ABT-719 is a 2-pyridone antimicrobial which inhibits DNA gyrase activity. It has considerable subcutaneous (sc) and oral efficacy in the treatment of experimental pyelonephritis induced in carrageenan-treated mice by clinical isolates of Enterococcus faecalis, Enterococcus faecium, Escherichia coli, and Pseudomonas aeruginosa. Therapeutic ED50s, defined here as producing a 2 log10 reduction in kidney bacterial burden, provide a reliable end point for comparison of drug efficacy in this experimental infection. Therapeutic ED50s for ABT-719 against these infections were equal to or up to ten-fold lower than those for ciprofloxacin, used as a reference because of similarity in mode of action. Against E. faecalis, the therapeutic ED50s for ABT-719 were 4.5–13.6 mg/kg.day for sc administration and 6.8–8.9 mg/kg.day for oral administration. ABT-719 was more potent than ciprofloxacin and vancomycin against the E. faecalis strains, which showed ciprofloxacin and vancomycin resistance covering a range of MICs. Against E. faecium, the therapeutic ED50s for ABT-719 were 8.8 mg/kg.day (sc) and 9.4 mg/kg.day (oral). Against an isolate of E. faecium showing ciprofloxacin and vancomycin resistance the ED50 for ABT-719 to achieve a 1 log10 reduction in kidney bacterial burden was 17.9 mg/kg.day by sc administration. While ABT-719 had lower efficacy against this isolate than against others, ciprofloxacin and vancomycin failed to show efficacy. Against E. coli, the therapeutic ED50, for ABT-719 was 1.1 mg/kg.day (oral), and against P. aeruginosa, this value was 2.7 mg/kg.day (oral) with values against both of these pathogens similar to those for ciprofloxacin. ABT-719, which represents the new 2-pyridone compound class, has promise for the treatment of urinary tract infections, as suggested by the significant efficacy seen against experimental pyelonephritis caused by E. coli, P. aeruginosa and susceptible and resistant enterococci." @default.
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- W2000238889 title "Efficacy of ABT-719, a 2-pyridone antimicrobial, against enterococci, Escherichia coli, and Pseudomonas aeruginosa in experimental murine pyelonephritis" @default.
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- W2000238889 doi "https://doi.org/10.1093/jac/38.4.641" @default.
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