title: Levofloxacin pharmacokinetics and serum bactericidal activities against five enterobacterial species.
abstract: After oral administration of 500 mg of levofloxacin to 12 volunteers, we investigated the pharmacokinetics and serum bactericidal activities (SBAs) against five strains of members of the family Enterobacteriaceae. Pharmacokinetic data were as follows: maximum concentration in serum, 6.36 +/- 0.57 mg/liter; area under the concentration-time curve, 43.6 +/- 6.23 mg. h/liter; elimination half-life 4.23 +/- 0.87 h. SBAs were present for 24 h against Escherichia coli and Citrobacter freundii. The SBAs at 1, 12, and 24 h after administration against E. coli were 1:108, 1:29, and 1:7, respectively, and those against Citrobacter freundii were 1:74, 1:25, and 1:7, respectively. The SBAs were present for 12 h against the other three organisms tested. The SBAs against Serratia marcescens were 1:28 and 1:9 at 1 and 12 h, respectively; the SBAs against Klebsiella pneumoniae were 1:25 and 1:7 at 1 and 12 h, respectively; and the SBAs against Enterobacter cloacae were 1:24 and 1:10 at 1 and 12 h, respectively.
authors.affiliation: Department of Pulmonary and Infectious Diseases, Freie Universität Berlin, 14109 Berlin, Germany. haloheck@zedat.fu-berlin.de
authors.forename: H F
authors.initials: HF
authors.lastname: Geerdes-Fenge
authors.forename: A
authors.initials: A
authors.lastname: Wiedersich
authors.forename: S
authors.initials: S
authors.lastname: Wagner
authors.forename: K H
authors.initials: KH
authors.lastname: Lehr
authors.forename: P
authors.initials: P
authors.lastname: Koeppe
authors.forename: H
authors.initials: H
authors.lastname: Lode
mesh_terms: D000328:Adult; D000890:Anti-Infective Agents / Q000493:pharmacokinetics*; D004755:Enterobacteriaceae / Q000187:drug effects* / Q000302:isolation & purification; D005260:Female; D006801:Humans; D064704:Levofloxacin; D008826:Microbial Sensitivity Tests; D015242:Ofloxacin / Q000493:pharmacokinetics*; D015610:Serum Bactericidal Test
chemical_list: D000890:Anti-Infective Agents; D064704:Levofloxacin; D015242:Ofloxacin