Emergence and acquisition of fluoroquinolone-resistant gram-negative bacilli in the intestinal tracts of mice treated with fluoroquinolone antimicrobial agents

Antimicrob Agents Chemother. 2008 Sep;52(9):3457-60. doi: 10.1128/AAC.00117-08. Epub 2008 Jul 7.

Abstract

After mice received orogastric administration of a fluoroquinolone-resistant Klebsiella pneumoniae strain, subcutaneous treatment with ciprofloxacin, levofloxacin, and moxifloxacin promoted persistent low-density colonization in 10% to 40% of the mice, whereas treatment with clindamycin consistently promoted high-density colonization. No emergence of fluoroquinolone-resistant gram-negative bacilli was detected in the mice during or after treatment with the fluoroquinolone antimicrobial agents.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Anti-Bacterial Agents* / pharmacology
  • Anti-Bacterial Agents* / therapeutic use
  • Clindamycin / therapeutic use
  • Drug Resistance, Bacterial*
  • Fluoroquinolones* / pharmacology
  • Fluoroquinolones* / therapeutic use
  • Gram-Negative Bacteria / drug effects*
  • Intestines / microbiology*
  • Klebsiella pneumoniae / drug effects*
  • Klebsiella pneumoniae / growth & development
  • Mice
  • Microbial Sensitivity Tests

Substances

  • Anti-Bacterial Agents
  • Fluoroquinolones
  • Clindamycin