title: Anti-Legionella activity of trovafloxacin compared with seven other antimicrobial agents including an intermethod evaluation.
abstract: The activity of trovafloxacin, a new fluorinated naphtheridone, was tested against 61 Legionella spp. isolates and compared with that of 4 fluoroquinolones, 2 macrolides, and rifampin. Trovafloxacin MICs were determined by a reference agar dilution method and E-test (Solna, Sweden) strips on buffered charcoal yeast extract agar. Among the fluoroquinolone compounds, the rank order of activity (on the basis of MIC90 results) determined with E-test strips was as follows: levofloxacin (MIC90, 0.094 microgram/ml) > trovafloxacin = sparfloxacin = ofloxacin (MIC90, 0.19 microgram/ml). Rifampin (MIC90, 0.008 microgram/ ml) and clarithromycin (MIC90, 0.032 microgram/ml) were the most potent of all drugs tested, and erythromycin and ciprofloxacin were the least active. In this study, the E-test strips with trovafloxacin were validated (100% of results +/- one log2 dilution compared to the reference value) for susceptibility testing with Legionella isolates.
authors.affiliation: Department of Pathology, University of Iowa College of Medicine, Iowa City 52242, USA.
authors.forename: F
authors.initials: F
authors.lastname: Marco
authors.forename: D J
authors.initials: DJ
authors.lastname: Biedenbach
authors.forename: R N
authors.initials: RN
authors.lastname: Jones
mesh_terms: D042462:4-Quinolones; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000494:pharmacology*; D024841:Fluoroquinolones; D016952:Legionella pneumophila / Q000187:drug effects*; D018942:Macrolides; D008826:Microbial Sensitivity Tests; D009287:Naphthyridines / Q000494:pharmacology*
chemical_list: D042462:4-Quinolones; D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D018942:Macrolides; D009287:Naphthyridines; C080163:trovafloxacin