title: Crossover assessment of serum bactericidal activity of grepafloxacin, ofloxacin and clarithromycin against respiratory pathogens after oral administration to healthy volunteers.
abstract: Serum bactericidal activity was studied in a crossover manner in 10 volunteers, after 2-day administration of grepafloxacin 600 mg qd, ofloxacin 400 mg bid and clarithromycin 500 mg bid. Bactericidal activity against clinical isolates of Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis and Klebsiella pneumoniae, was estimated using a standardized microdilution method. Grepafloxacin was highly active against Gram-negative organisms and adequate against pneumococci (mean, 1:13.3). Clarithromycin was very active against both penicillin-susceptible and penicillin-partially-resistant S. pneumoniae (1:102.5) but had poor activity against H. influenzae (1:3.1). Minor adverse effects were commonly associated with grepafloxacin.
authors.affiliation: Infectious Diseases Unit, The E. Wolfson Hospital, 58100, Holon, Israel. midan@post.tau.ac.il
authors.forename: M
authors.initials: M
authors.lastname: Dan
authors.forename: F
authors.initials: F
authors.lastname: Poch
authors.forename: J
authors.initials: J
authors.lastname: Asherov
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000097:blood / Q000494:pharmacology*; D001770:Blood Bactericidal Activity / Q000187:drug effects*; D017291:Clarithromycin / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D018592:Cross-Over Studies; D005260:Female; D024841:Fluoroquinolones; D006193:Haemophilus influenzae / Q000187:drug effects / Q000302:isolation & purification; D006801:Humans; D066298:In Vitro Techniques; D007711:Klebsiella pneumoniae / Q000187:drug effects / Q000302:isolation & purification; D008297:Male; D001936:Moraxella catarrhalis / Q000187:drug effects / Q000302:isolation & purification; D015242:Ofloxacin / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D010403:Penicillin Resistance; D010879:Piperazines / Q000008:administration & dosage / Q000009:adverse effects / Q000097:blood / Q000494:pharmacology*; D012141:Respiratory Tract Infections / Q000188:drug therapy* / Q000382:microbiology*; D013296:Streptococcus pneumoniae / Q000187:drug effects / Q000302:isolation & purification
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D010879:Piperazines; D015242:Ofloxacin; D017291:Clarithromycin; C075375:grepafloxacin