Comparative therapeutic efficacy of clinafloxacin in a pneumococcal meningitis mouse model.
The therapeutic efficacy of clinafloxacin, a fluoroquinolone in clinical trials, was compared with that of ciprofloxacin and ceftriaxone in a novel pneumococcal meningitis mouse model. Mice were challenged by the intracerebral ventricular route with 50 IL of a lethal bacterial suspension and treated subcutaneously 2 h later. Both penicillin-susceptible and multidrug-resistant pneumococcal strains were used for evaluation. Survival percentages were calculated as the median curative dose (CD50) using log-probit statistical methods. Ceftriaxone was the most active agent against the penicillin-susceptible strain (CD50 = 2 mg/kg), but showed a 30-fold decrease in potency against the resistant strain. Clinafloxacin was equally effective against both strains, and proved to be the most active agent against the penicillin-resistant pneumococcus.
Shapiro
M A
MA
Department of Infectious Diseases, Parke-Davis Pharmaceutical Research, Division of Warner-Lambert Company, Ann Arbor, MI 48105, USA.
Donovan
K D
KD
Gage
J W
JW
D000818:Animals; D000890:Anti-Infective Agents / Q000627:therapeutic use*; D002443:Ceftriaxone / Q000627:therapeutic use; D002511:Cephalosporins / Q000627:therapeutic use; D002939:Ciprofloxacin / Q000627:therapeutic use; D005260:Female; D024841:Fluoroquinolones; D008586:Meningitis, Pneumococcal / Q000382:microbiology / Q000517:prevention & control*; D051379:Mice; D008826:Microbial Sensitivity Tests; D008954:Models, Biological; D013296:Streptococcus pneumoniae / Q000187:drug effects
D000890:Anti-Infective Agents; D002511:Cephalosporins; D024841:Fluoroquinolones; D002939:Ciprofloxacin; D002443:Ceftriaxone; C057477:clinafloxacin