Abstract
We developed a simplified assay for estimating efflux by measuring the effect of reserpine on the growth of Streptococcus pneumoniae and Staphylococcus aureus over 7 h. Reserpine enhanced ciprofloxacin and levofloxacin 17 to 68%. The hydrophobic drug trovafloxacin and the drug moxifloxacin, with a bulky C-7 substituent but hydrophilicity similar to that of levofloxacin, showed little (0 to 11%) reserpine-enhancing effect. The ease of resistant mutant strain selection correlated with efflux susceptibility.
MeSH Terms
Anti-Infective Agents/metabolism,pharmacology
Aza Compounds
Drug Resistance, Microbial
Fluoroquinolones
Microbial Sensitivity Tests
Moxifloxacin
Naphthyridines/metabolism,pharmacology
Quinolines
Reserpine/pharmacology
Staphylococcus aureus/drug effects,genetics,metabolism
Streptococcus pneumoniae/drug effects,genetics,metabolism
Chemicals
Anti-Infective Agents
Aza Compounds
Fluoroquinolones
Naphthyridines
Quinolines
Reserpine
trovafloxacin
sparfloxacin
Moxifloxacin
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Beyer R
Department of Pathology, Division of Microbiology, Northwestern University Medical School, Chicago, Illinois 60611, USA.
Pestova E
Millichap J J
Stosor V
Noskin G A
Peterson L R
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