Abstract
We determined the relationship between garenoxacin exposure and quinolone-resistant subpopulations for three bacterial isolates in an in vitro hollow-fiber infection model. An "inverted-U" relationship was identified wherein resistant subpopulations rose initially and then declined with increasing exposure, until reaching a threshold that prevented resistance amplifications. Different targets for the area under the concentration-time curve over 24 h/MIC ratio were required for different bacteria.
MeSH terms
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Anti-Bacterial Agents / metabolism
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Anti-Bacterial Agents / pharmacology*
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Drug Resistance, Bacterial* / drug effects
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Fluoroquinolones / metabolism
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Fluoroquinolones / pharmacology*
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Klebsiella pneumoniae / drug effects*
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Klebsiella pneumoniae / growth & development
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Klebsiella pneumoniae / metabolism
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Microbial Sensitivity Tests
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Quinolines / metabolism
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Quinolines / pharmacology*
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Staphylococcus aureus / drug effects*
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Staphylococcus aureus / growth & development
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Staphylococcus aureus / metabolism
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Streptococcus pneumoniae / drug effects*
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Streptococcus pneumoniae / growth & development
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Streptococcus pneumoniae / metabolism
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Time Factors
Substances
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Anti-Bacterial Agents
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Fluoroquinolones
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Quinolines
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quinoline
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garenoxacin