Comparison of in-vitro activities of SCH27899 and other antibiotics against Mycoplasma pneumoniae
2001
We examined the in-vitro activities of various antibiotics against 25 strains of Mycoplasma pneumoniae (22 clinical isolates and 3 standard strains). In the 22 clinical isolates, the 90% minimum inhibitory concentrations (MIC 90) of SCH27899, ofloxacin, levofloxacin, ciprofloxacin, erythromycin, clarithromycin, roxithromycin, clindamycin, and minocycline were 16, 2, 2, 4, 0.0039, 0.0039, 0.016, 2, and 4 μg/ml, respectively. The minimum bactericidal concentrations (MBC 90) of SCH27899, ofloxacin, levofloxacin, ciprofloxacin, erythromycin, clarithromycin, roxithromycin, clindamycin, and minocycline were 64, 4, 2, 8, 0.0625, 0.0625, 0.125, 8, and 64 μg/ml, respectively. The low sensitivity of M. pneumoniae to SCH27899 may be a result of the impermeability of the bacteria to this molecule. The results of this study suggest that SCH27899 would not be a suitable antimicrobial agent to use in the alternative chemotherapy of M. pneumoniae infection.
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