title: In-vitro and in-vivo activity of DR-3355, an optically active isomer of ofloxacin.
abstract: DR-3355 [S-(-)-ofloxacin], an optically active isomer of ofloxacin, showed a broad spectrum of antibacterial activity against both Gram-positive and Gram-negative bacteria and was generally twice as potent as ofloxacin and considerably more active than DR-3354 [R-(+)-ofloxacin]. The activity of DR-3355 was largely unaffected by the type of culture medium, inoculum size and addition of human serum, but decreased under acidic condition at pH 6.0. The protective effect of orally administered DR-3355 in experimental infections in mice with various bacterial pathogens was superior to those of ofloxacin and ciprofloxacin.
authors.affiliation: Department of Microbiology, Kyoto Pharmaceutical University, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Tanaka
authors.forename: M
authors.initials: M
authors.lastname: Otsuki
authors.forename: T
authors.initials: T
authors.lastname: Une
authors.forename: T
authors.initials: T
authors.lastname: Nishino
mesh_terms: D000818:Animals; D001419:Bacteria / Q000187:drug effects*; D001424:Bacterial Infections / Q000188:drug therapy / Q000382:microbiology; D002939:Ciprofloxacin / Q000494:pharmacology / Q000627:therapeutic use; D003470:Culture Media; D006863:Hydrogen-Ion Concentration; D007536:Isomerism; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D008826:Microbial Sensitivity Tests; D015242:Ofloxacin / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D003470:Culture Media; D002939:Ciprofloxacin; D015242:Ofloxacin