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Doxycycline or ciprofloxacin prophylaxis and therapy against experimental Yersinia pestis infection in mice.

Abstract
The efficacy of doxycycline and ciprofloxacin against an experimental plague infection was assessed by comparing the median lethal dose (MLD) of Yersinia pestis in antibiotic-treated and untreated mice. The MLD of Y. pestis GB strain in untreated mice by the intra-peritoneal route was 23 cfu. If ciprofloxacin dosage (20 or 40 mg/kg twice daily) was initiated 48 h before infection, it afforded complete protection against an intra-peritoneal challenge of 5.24 x 10(7) cfu. Ciprofloxacin therapy initiated 24 h post-challenge was less protective, the MLD was raised to 2.0 x 10(5) and 2.2 x 10(5) cfu for 40 and 20 mg/kg respectively. Doxycycline dosage (40 mg/kg twice daily) initiated 48 h prior to infection raised the MLD to 1.6 x 10(4) cfu, but other prophylactic and therapeutic regimes were ineffective against challenges greater than 6.76 x 10(2) cfu. Ciprofloxacin may therefore be a useful antibiotic to consider for the treatment of plague.
AuthorsP Russell, S M Eley, D L Bell, R J Manchee, R W Titball
JournalThe Journal of antimicrobial chemotherapy (J Antimicrob Chemother) Vol. 37 Issue 4 Pg. 769-74 (Apr 1996) ISSN: 0305-7453 [Print] England
PMID8722542 (Publication Type: Journal Article)
Chemical References
  • Anti-Bacterial Agents
  • Anti-Infective Agents
  • Ciprofloxacin
  • Doxycycline
Topics
  • Animals
  • Anti-Bacterial Agents (therapeutic use)
  • Anti-Infective Agents (therapeutic use)
  • Ciprofloxacin (therapeutic use)
  • Doxycycline (therapeutic use)
  • Mice
  • Plague (drug therapy)
  • Yersinia pestis (drug effects)

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