In vivo development of high-level fluoroquinolone resistance in Streptococcus pneumoniae in chronic obstructive pulmonary disease
Abstract
Patients with chronic obstructive pulmonary disease are generally subjected to multiple regimens of antimicrobial treatment. The development of high-level levofloxacin resistance (i.e., a minimum inhibitory concentration >8 mu g/mL) in 8 patients whose previous pneumococcal isolates showed susceptibility is described. Molecular methods were used to characterize the strains and to study the sequential changes in fluoroquinolone targets.
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