Single and multi-step resistance selection study in Streptococcus pneumoniae comparing ceftriaxone with levofloxacin, gatifloxacin and moxifloxacin.

Abstract excerpt

Attempts were made to select resistant pneumococcal mutants by sequential subculturing of 12 clinically isolated pneumococci, [four were penicillin sensitive (MIC) 0.03-0.06 mg/l, four penicillin intermediate (MIC 0.25-0.5 mg/l) and four penicillin resistant (MIC 2-4 mg/l)] in sub-inhibitory concentrations of ceftriaxone, levofloxacin, gatifloxacin and moxifloxacin. Subculturing in gatifloxacin, levofloxacin,...

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