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  • Title: In-vitro activity of pefloxacin compared to enoxacin, norfloxacin, gentamicin and new beta-lactams.
    Author: Clarke AM, Zemcov SJ, Campbell ME.
    Journal: J Antimicrob Chemother; 1985 Jan; 15(1):39-44. PubMed ID: 3156112.
    Abstract:
    The in-vitro activity of pefloxacin was compared with that of norfloxacin, enoxacin, nalidixic acid, gentamicin, cefotaxime, ceftazidime and, where appropriate, other beta-lactams against a total of 363 recent clinical isolates. An agar dilution procedure was used to determine MICs and two inocula (10(4) and 10(6) cfu) were used throughout. Pefloxacin inhibited 90% of isolates of Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, indole-positive Proteus spp., Enterobacter spp., Shigella sonnei, Salmonella typhi, Campylobacter jejuni, Staphylococcus aureus and Haemophilus influenzae at less than or equal to 0.5 mg/l. Serratia marcescens and Providencia stuartii were somewhat more resistant, 2 mg/l of pefloxacin being required to inhibit 90% of isolates of these species. Pefloxacin inhibited 90% of isolates of Pseudomonas aeruginosa at 4 mg/l and 90% of isolates of the Bacteroides fragilis group at 16 mg/l. The activity of enoxacin was similar to that of pefloxacin, with enoxacin being four-fold less active against Staph. aureus, two-fold less active against the Bacteroides fragilis group and most species of the Enterobacteriaceae, and two-fold more active against Ps. aeruginosa. Pefloxacin showed good activity against gentamicin-resistant Ps. aeruginosa and Enterobacteriaceae and against methicillin-resistant Staph. aureus. Strains with decreased susceptibility to norfloxacin tended to be less susceptible to both pefloxacin and enoxacin.
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