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  • Title: Postantibiotic effect of ceftibuten on respiratory pathogens.
    Author: Chin NX, Huang HB, Neu HC.
    Journal: Pediatr Infect Dis J; 1995 Jul; 14(7 Suppl):S84-7. PubMed ID: 7567315.
    Abstract:
    The postantibiotic effect (PAE) of ceftibuten, a novel beta-lactamase-stable cephem, was determined for Streptococcus pyogenes, Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis. The ceftibuten PAE after a 2-hour exposure to 2 micrograms/ml (4 x minimum inhibitory concentration) for S. pyogenes was 2.7 to > 10 hours. The PAE for S. pneumoniae after a 2-hour exposure to 15 micrograms/ml, concentrations that are achieved in man after usual therapeutic doses, was 1.1 to 3.4 hours and the PAE for H. influenzae was 1 to 1.1 hours. M. catarrhalis had a PAE of 1.5 to 1.8 hours after exposure to 15 micrograms/ml of ceftibuten. The ceftibuten PAE was not affected by serum. The ceftibuten PAE was prolonged by exposure to a sub-minimum inhibitory concentration concentration of ceftibuten as would occur in the clinical situation. The PAE of ceftibuten was not affected by the copresence of erythromycin as would occur when treating infections in which atypical organisms are suspected. There was no correlation between bacterial reduction in colony-forming units and the duration of PAE. A level of 6 micrograms/ml of ceftibuten had a similar bacterial killing activity compared with a 6-hour exposure to 15 micrograms/ml of ceftibuten against S. pneumoniae, H. influenzae and M. catarrhalis. This study suggests that ceftibuten can be administered orally, once daily in an adult dose of 400 mg or a pediatric dose of 9 mg/kg, to treat respiratory infections caused by the most common pathogens.
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