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  • Title: In vitro activity of lomefloxacin (SC-47111) against enterobacteriaceae, enterococci and staphylococci.
    Author: Cornaglia G, Ligozzi M, Pelosi E, Canepari P, Fontana R.
    Journal: J Chemother; 1989 Apr; 1(2):84-90. PubMed ID: 2786558.
    Abstract:
    The activity of lomefloxacin, a new difluorinated quinolone, was tested against 190 Enterobacteriaceae strains (belonging to 23 different species), 70 enterococci and 70 staphylococci. As regards Enterobacteriaceae, the activity of lomefloxacin was the same as that of norfloxacin in 9 out of the 23 species tested, and only slightly lower in further 8 species. Minimum inhibitory concentrations (MIC) values for 90% of strains were 0.5 microgram/ml in 2 species, 0.25 microgram/ml in 6, 0.125 microgram/ml in 4, and lower than 0.125 microgram/ml in 8. Slightly higher values were obtained for Serratia marcescens (2 micrograms/ml), whilst, as already reported for the other new quinolones, the susceptibility of the Providencia genus was very poor, with MIC values up to 128 micrograms/ml for the vast majority of strains. Lomefloxacin proved bactericidal at the MIC in all the Enterobacteriaceae strains tested but 20. In the latter strains, however, bactericidal activity could be appreciated at values slightly exceeding MIC. As regards enterococci, the MIC for 90% of strains was 32 micrograms/ml. Minimum bactericidal concentration (MBC) was the same as the MIC for 78% of the strains tested and was only twofold higher in all the others. The new drug was also active against staphylococci having an MIC50 and MIC90 of 0.5 and 2 micrograms/ml, respectively. It was bactericidal at the MIC for 62% of the strains and at twofold the MIC for all the others.
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