title: In vitro activity of sparfloxacin.
abstract: Sparfloxacin, a new fluoroquinolone, inhibited the majority of members of the family Enterobacteriaceae at less than or equal to 1 microgram/ml. It was less active than ciprofloxacin but more active than ofloxacin. Against Pseudomonas aeruginosa, it was less active than ciprofloxacin but twofold more active than ofloxacin. It inhibited Staphylococcus aureus and most Streptococcus pneumoniae and Streptococcus pyogenes isolates at 0.25 micrograms/ml, whereas ciprofloxacin and ofloxacin inhibited these isolates at 2 micrograms/ml. Bacteroides fragilis was inhibited by less than or equal to 2 micrograms/ml. Sparfloxacin was less active at an acidic pH and in the presence of Mg2+. Resistance to sparfloxacin was produced by repeated exposure, although the frequency of single-step mutants was less than 10(-9).
authors.affiliation: Department of Medicine, College of Physicians & Surgeons, Columbia University, New York, New York 10032.
authors.forename: N X
authors.initials: NX
authors.lastname: Chin
authors.forename: J W
authors.initials: JW
authors.lastname: Gu
authors.forename: K W
authors.initials: KW
authors.lastname: Yu
authors.forename: Y X
authors.initials: YX
authors.lastname: Zhang
authors.forename: H C
authors.initials: HC
authors.lastname: Neu
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D002939:Ciprofloxacin / Q000494:pharmacology; D004755:Enterobacteriaceae / Q000187:drug effects*; D024841:Fluoroquinolones; D006863:Hydrogen-Ion Concentration; D008826:Microbial Sensitivity Tests; D015242:Ofloxacin / Q000494:pharmacology
chemical_list: D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D002939:Ciprofloxacin; D015242:Ofloxacin; C061363:sparfloxacin