Question

example of plague

Answer 1

Plague is a severe bacterial infection caused by Yersinia pestis. Common examples and contexts:

- Clinical forms
- Bubonic plague — swollen, painful lymph nodes (“buboes”), fever; the most common form.
- Pneumonic plague — lung infection, transmissible person-to-person by respiratory droplets; rapidly fatal if untreated.
- Septicemic plague — bloodstream infection, can cause shock and bleeding disorders.

- Historical and modern examples
- Black Death (mid-14th century Europe) — massive bubonic-pneumonic pandemic that killed a large portion of Europe’s population.
- Justinianic Plague (6th century) — an earlier devastating pandemic affecting the Eastern Roman Empire.
- Third Pandemic (late 19th–early 20th century) — global spread that led to discovery of Y. pestis.
- Recent outbreaks — e.g., Madagascar (2017) with both bubonic and pneumonic cases; small, sporadic cases occasionally occur in the U.S. Southwest.

- Transmission, treatment and prevention (brief)
- Transmitted mainly by infected rodent fleas; pneumonic form transmits by respiratory droplets.
- Treated with prompt antibiotics (e.g., streptomycin or gentamicin, doxycycline or fluoroquinolones in some settings).
- Prevent with rodent/flea control, avoid contact with sick animals, and respiratory precautions for pneumonic cases.

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