Successful Treatment of Human Plague with Oral Ciprofloxacin

Insights

Ciprofloxacin is now FDA-approved for treating plague (Yersinia pestis infection), though human data is limited. This study reports successful oral ciprofloxacin treatment in five human plague cases, including pneumonic plague.

Area of Science:

  • Infectious Diseases
  • Pharmacology
  • Clinical Medicine

Background:

  • The US Food and Drug Administration (FDA) approved ciprofloxacin for plague treatment based on animal studies.
  • Published evidence of ciprofloxacin efficacy in human plague cases is limited.
  • Plague, caused by Yersinia pestis, remains a serious public health concern requiring effective treatment options.

Purpose of the Study:

  • To evaluate the efficacy of oral ciprofloxacin in treating culture-confirmed human plague.
  • To present case reports of human plague successfully treated with ciprofloxacin.
  • To contribute to the limited human evidence supporting ciprofloxacin use for plague.

Main Methods:

  • Retrospective case series of five patients with culture-confirmed human plague.
  • Treatment administered orally with ciprofloxacin.
  • Clinical outcomes and microbiological confirmation were assessed.

Main Results:

  • All five patients with human plague achieved successful treatment outcomes with oral ciprofloxacin.
  • The cases included a patient with pneumonic plague, demonstrating broad applicability.
  • No adverse events were reported during the treatment period.

Conclusions:

  • Oral ciprofloxacin appears to be an effective treatment for human plague, including pneumonic forms.
  • These case reports provide valuable human data supporting the FDA approval of ciprofloxacin for plague.
  • Further research and larger clinical trials are warranted to confirm these findings.