Comparative activities of ciprofloxacin and levofloxacin against Streptococcus pneumoniae in an In vitro dynamic model
Abstract
The activities of levofloxacin (500 mg every 24 h) and ciprofloxacin (750 mg every 12 h) against six pneumococcal isolates in an in vitro dynamic model were compared. For one strain, levofloxacin reduced the inoculum by over 4 log CFU/ml and ciprofloxacin reduced the inoculum by over 2 log CFU/ml. For four isolates, both drugs reduced inocula by 4 log CFU/ml within 6 h, suggesting that this dose of ciprofloxacin should be as effective as levofloxacin against these pneumococci.
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