Bactericidal effect of levofloxacin on strains with equal susceptibility in an in vitro urinary bladder model.

Abstract:

:The in vitro bactericidal effects of therapeutic concentrations of levofloxacin (LVFX) on clinical isolates of Pseudomonas aeruginosa and Enterococcus faecalis were assessed. Starting from 10(7) CFU/ml, the bacterial count was determined serially during the exposure to LVFX present at concentrations automatically simulated to its clinically achievable urinary levels at the recommended dosage (100 mg 3 times daily). An isolate of P. aeruginosa for which the MIC of LVFX was 16 microgram/ml was completely eradicated after 10 h of exposure to LVFX. On the other hand, 40 h of exposure to LVFX were required for complete eradication of an isolate of E. faecalis with equal susceptibility, although the bacterial count was rapidly reduced to 10(2) CFU/ml in the early phase of the exposure. It was concluded that LVFX exerts a more potent bactericidal effect on P. aeruginosa than on E. faecalis despite a similar susceptibility of these organisms to LVFX.

journal_name

Chemotherapy

journal_title

Chemotherapy

authors

Takahashi S,Sano M,Nishimura M,Matsukawa M,Mikami M,Hirose T,Tsukamoto T

doi

10.1159/000007133

subject

Has Abstract

pub_date

1998-09-01 00:00:00

pages

337-42

issue

5

eissn

0009-3157

issn

1421-9794

pii

che44337

journal_volume

44

pub_type

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