In vitro activity of E-4868, a new fluoroquinolone with a 7-azetidin ring, compared with ciprofloxacin, ofloxacin and fleroxacin.
E-4868, (-)-7[3-(R)-amino-2-(S)-methyl-1-azetidinyl]-1-(2,4- difluorophenyl)-1,4-dihydro-6-fluoro-4-oxo-3-quinolinecarboxylic acid, is a new fluoroquinolone with a 7-azetidin ring substituent. The in vitro activity against clinical isolates was compared with that of ciprofloxacin, ofloxacin and fleroxacin. In general, activity of E-4868 against aerobic and facultative anaerobic Gram-negative bacilli was equal to or slightly less active than ciprofloxacin with the exception of Morganella morganii and Proteus spp., E-4868 MIC90, 1 and 0.5 microgram/ml, respectively. E-4868 activity was two- to eight-fold higher than ciprofloxacin against Gram-positive cocci. For anaerobic species, E-4868 activity was comparable to that of ciprofloxacin, although against the Bacteroides fragilis group E-4868 was four-fold more active than ciprofloxacin.
Microbiology Department, Hospital de Sant Pau, Barcelona, Spain.
B
B
Mirelis
F
F
Navarro
E
E
Miró
R
R
Coll
M A
MA
Xicota
G
G
Prats
D000890:Anti-Infective Agents / Q000494:pharmacology*; D001421:Bacteria, Anaerobic / Q000187:drug effects; D002939:Ciprofloxacin / Q000494:pharmacology; D004755:Enterobacteriaceae / Q000187:drug effects; D016576:Fleroxacin / Q000494:pharmacology; D024841:Fluoroquinolones; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006095:Gram-Positive Cocci / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D015242:Ofloxacin / Q000494:pharmacology; D015363:Quinolones / Q000494:pharmacology*
D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D015363:Quinolones; C081131:E-4868; D002939:Ciprofloxacin; D015242:Ofloxacin; D016576:Fleroxacin