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  • Title: Activity of telithromycin against key pathogens associated with community-acquired respiratory tract infections.
    Author: Low DE, Felmingham D, Brown SD, Rangaraju M, Nusrat R.
    Journal: J Infect; 2004 Aug; 49(2):115-25. PubMed ID: 15236918.
    Abstract:
    OBJECTIVES: To investigate the correlation between in vitro susceptibility of isolates and clinical outcomes with telithromycin in respiratory tract infections. METHODS: The activity of telithromycin was determined by in vitro susceptibility testing of key respiratory tract pathogens isolated from patients with community-acquired pneumonia, acute exacerbations of chronic bronchitis or acute maxillary sinusitis enrolled in 14 Phase III/IV clinical trials evaluating the clinical efficacy of telithromycin. RESULTS: In this pooled analysis, telithromycin mode minimum inhibitory concentration (MIC) and MIC90, respectively, were: 0.016 and 0.03 mg/l against Streptococcus pneumoniae (n=626); 0.03 and 0.5 mg/l for penicillin-resistant S. pneumoniae (n=56); 0.03 and 1 mg/l for erythromycin-resistant S. pneumoniae (n=81); 2 and 4 mg/l against Haemophilus influenzae (including beta-lactamase producers; n=627); both 0.12 mg/l for Moraxella catarrhalis (n=159) and both 0.25 mg/l for Staphylococcus aureus (n=124). Telithromycin (5 or 7-10 days) resulted in overall clinical and bacteriologic success rates of 88.1% (1593/1808) and 89% (1593/1789), respectively. CONCLUSIONS: High levels of in vitro susceptibility to telithromycin are paralleled by high rates of clinical cure and bacteriologic eradication.
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