Treatment
Plague treatment: antibiotics, duration and post-exposure steps
Quick answer
- Plague is treated with antibiotics, and starting early is the most important factor for recovery.
- First line: aminoglycosides (streptomycin and gentamicin). Alternatives: doxycycline, ciprofloxacin, levofloxacin and, in specific situations, chloramphenicol.
- Typical duration is about 10 to 14 days, depending on the clinical form and course.
- Close contacts of pneumonic plague cases may receive preventive antibiotics for about 7 days.
The principle: treat early, do not wait for tests
Plague is a medical emergency. Antibiotic treatment should begin as soon as there is clinical and epidemiological suspicion, without waiting for laboratory confirmation, because the disease can progress rapidly — especially the pneumonic form.
Never self-medicate
The choice of antibiotic and dose requires medical assessment. Improper use may be ineffective and contributes to antimicrobial resistance.
Which antibiotics are used
| Class | Examples | Typical use |
|---|---|---|
| Aminoglycosides | Streptomycin, gentamicin | First line in many protocols |
| Tetracyclines | Doxycycline | Alternative; also used for prophylaxis |
| Fluoroquinolones | Ciprofloxacin, levofloxacin | Alternative; also used for prophylaxis |
| Amphenicols | Chloramphenicol | Specific situations, such as meningitis |
How long treatment lasts
Treatment usually lasts about 10 to 14 days, adjusted to the clinical form and the patient's response. In pneumonic plague, respiratory isolation is recommended for at least 48 hours of effective antibiotics, when transmission risk falls sharply.
Supportive care
Beyond antibiotics, patients with severe forms may need hospital support: hydration, control of fever and blood pressure, oxygen, correction of coagulation problems and, in respiratory failure, mechanical ventilation. Drainage of suppurated buboes, when indicated, is a medical decision requiring biosafety precautions.
Post-exposure prophylaxis for contacts
Close contacts of a pneumonic plague case may receive preventive antibiotics, usually for about 7 days, to eliminate the bacterium during the incubation period before disease develops.
| Antibiotic | Typical regimen | Duration |
|---|---|---|
| Doxycycline | 100 mg orally every 12 hours | 7 days |
| Ciprofloxacin | 500 mg orally every 12 hours | 7 days |
Prophylaxis is not routinely indicated for contacts of bubonic plague, which does not spread between people by the respiratory route.
Antimicrobial resistance
Yersinia pestis is naturally susceptible to several antibiotics, and resistance is considered rare. Still, a multidrug-resistant strain was described in Madagascar in the 1990s. Rational antibiotic use, under prescription, is essential to keep these options effective.
Frequently asked questions
Is plague curable?
Yes, it is a bacterial disease treatable with antibiotics. The chance of recovery is high when treatment starts early; without treatment, fatality is high.
What is the first-line antibiotic for plague?
Aminoglycosides such as streptomycin and gentamicin are often first line. Doxycycline and fluoroquinolones are alternatives, according to protocol and medical assessment.
How long does plague treatment last?
About 10 to 14 days, adjusted to the clinical form and the patient's course.
Do contacts of a case need medication?
Close contacts of pneumonic plague may receive preventive antibiotics for about 7 days, by medical indication and public-health guidance.
Sources
Medical review
Review by a licensed health professional is being arranged. This educational content is based on reference sources (WHO, CDC and medical literature) and does not replace evaluation, diagnosis or treatment by a health professional.
How this content was produced
- Who
- Produced by the Equipe editorial do Peste.com.br, the editorial team responsible for gathering, verifying and classifying public information about plague (Yersinia pestis).
- How
- Information is compiled from official and scientific sources (WHO, CDC and national health authorities) and from recognised news outlets. Every statement is classified as confirmed, reported or unconfirmed, and each article lists its sources.
- Why
- To offer clear, source-based information in Portuguese about plague and to separate verified fact from rumour. This content is educational and does not replace medical advice.
- Medical review
- Review by a licensed health professional is being arranged; no credential is claimed until a real professional is credited.
- Last review
See our sources and methodology and the editorial team.A revisão por profissional de saúde habilitado está em processo de credenciamento. Assim que concluída, o nome e o registro serão informados nesta página e nos dados estruturados.