In Vitro Activity of Trovafloxacin Compared to Those of Five Antimicrobials against Mycoplasmas Including Mycoplasma hominis and Ureaplasma urealyticum Fluoroquinolone-Resistant Isolates That Have Been Genetically Characterized

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Abstract
The in vitro activity of trovafloxacin against 125 strains ofMycoplasma species and Ureaplasma urealyticum, including fluoroquinolone-susceptible and fluoroquinolone-resistant species, was compared to those of other fluoroquinolones, doxycycline, and erythromycin. The MIC at which 90% of isolates are inhibited for all fluoroquinolone-susceptible strains was 0.25 μg/ml. Whatever the associated mutations, trovafloxacin exhibited greater activity than the other fluoroquinolones tested against fluoroquinolone-resistantMycoplasma hominis and U. urealyticum isolates.