title: Comparative activities of ciprofloxacin and levofloxacin against Streptococcus pneumoniae in an In vitro dynamic model.
abstract: The activities of levofloxacin (500 mg every 24 h) and ciprofloxacin (750 mg every 12 h) against six pneumococcal isolates in an in vitro dynamic model were compared. For one strain, levofloxacin reduced the inoculum by over 4 log CFU/ml and ciprofloxacin reduced the inoculum by over 2 log CFU/ml. For four isolates, both drugs reduced inocula by 4 log CFU/ml within 6 h, suggesting that this dose of ciprofloxacin should be as effective as levofloxacin against these pneumococci.
authors.affiliation: Department of Medicine, Rhode Island Hospital, Roger Williams Medical Center, Brown University, Providence, Rhode Island, USA. szinner@caregroup.harvard.edu
authors.forename: S H
authors.initials: SH
authors.lastname: Zinner
authors.forename: K
authors.initials: K
authors.lastname: Simmons
authors.forename: D
authors.initials: D
authors.lastname: Gilbert
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D002939:Ciprofloxacin / Q000494:pharmacology*; D015169:Colony Count, Microbial; D006801:Humans; D064704:Levofloxacin; D015242:Ofloxacin / Q000494:pharmacology*; D013296:Streptococcus pneumoniae / Q000187:drug effects* / Q000254:growth & development
chemical_list: D000890:Anti-Infective Agents; D002939:Ciprofloxacin; D064704:Levofloxacin; D015242:Ofloxacin