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  • Title: [Bactericide activity of cefadroxil comparated with amoxicillin-clavulanic acid, cefaclor and josamycin].
    Author: Etesse-Carsenti H, Caillon J, Mondain V, Durant J, Bernard E, Dellamonica P, Drugeon HB.
    Journal: Pathol Biol (Paris); 1991 Sep; 39(7):658-67. PubMed ID: 1758716.
    Abstract:
    Betalactamase-producing organisms are responsible for an increasing number of ENT and lower respiratory tract infections. Or cephalosporins and the combination of amoxicillin with the beta-lactamase inhibitor clavulanic acid are alternatives to ampicillin therapy. The killing activity of cefadroxil on the organisms most often responsible for ENT and respiratory infections was evaluated in vitro using a viable bacteria count method, comparatively with cefaclor, josamycin, and amoxicillin-clavulanic acid. Killing activity was found to be time-dependent for all the antimicrobial agents studied. Cefadroxil exhibited the same bactericidal effect on Streptococcus pyogenes and S. pneumoniae than the other agents. Haemophilus influenzae and an increasing number of Pneumococcus strains were resistant to josamycin which is therefore not appropriate for first-line therapy. As compared with amoxicillin and amoxicillin-clavulanic acid, cefadroxil was less active on H. influenzae and more active on Staphylococcus aureus. Production of beta-lactamase failed to influence the killing activity of cefadroxil. These bacteriologic data, together with results of pharmacologic studies (long half-life and good penetration within tissues) can explain the clinical successes obtained with cefadroxil in ENT and lower respiratory tract infections.
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