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  • Title: In vitro activity of cefdinir (FK482) and ten other antibiotics against gram-positive and gram-negative bacteria isolated from adult and pediatric patients.
    Author: Sultan T, Baltch AL, Smith RP, Ritz W.
    Journal: Chemotherapy; 1994; 40(2):80-91. PubMed ID: 8131638.
    Abstract:
    The in vitro activity of cefdinir, an oral aminothiazolyl hydroxyimino cephalosporin was compared with that of cefixime, cefpodoxime, cefaclor, cephalexin, ciprofloxacin, ofloxacin, oxacillin, ampicillin, vancomycin and trimethoprim-sulfamethoxazole against 279 gram-positive and gram-negative recent clinical isolates from adult and pediatric patients. Cefdinir was the most active drug among the cephalosporins against oxacillin-sensitive Staphylococcus aureus and coagulase-negative staphylococci, Streptococcus pneumoniae, S. pyogenes, Escherichia coli and Moraxella catarrhalis (MIC90 0.015-2 mg/l). Cefixime was the most active agent against Hemophilus influenzae, Klebsiella pneumoniae, K. oxytoca, Proteus mirabilis and P. vulgaris (MIC90 < 0.015-0.125 mg/l). The activity of cefpodoxime was better than that of cefixime against S. pneumoniae and oxacillin-sensitive staphylococci (MIC90 0.25-8 vs. 0.5-32 mg/l), similar to cefixime against S. pyogenes (MIC90 0.06 mg/l) and not as good as cefixime against H. influenzae, M. catarrhalis, Klebsiella spp. and Proteus spp. (MIC90 < 0.015-0.25 vs. 0.125-0.5 mg/l). The activity of cefdinir was greater than that of the other cephalosporins against Enterococcus faecalis (MIC90 16-32 vs. > 64 mg/l). None of the cephalosporins were active against methicillin-resistant, coagulase-positive or -negative staphylococci or Pseudomonas aeruginosa (MIC90 > 64 mg/l). Overall, the susceptibilities of adult and pediatric isolates were similar. Kinetic kill curves demonstrated rapid and similar killing at 6 h by cefdinir, cefixime, cefpodoxime and ofloxacin. At 24 h at 1 x MIC, the least regrowth was observed with cefdinir and cefpodoxime; at 2 x MIC, suppression of growth was similar with all four drugs.
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