What is a Bubonic Plague?

Plague is an infectious disease caused by a specific type of bacteria called Yersinia pestis, a zoonotic bacteria usually found in small mammals and their fleas.

What is a Bubonic Plague?
Table of Contents

About Bubonic Plague

  • Plague is an infectious disease caused by a specific type of bacterium called Yersinia pestis, a zoonotic bacterium usually found in small mammals and their fleas.
  • Y. pestis can affect humans and animals and is spread mainly by fleas.
  • Bubonic plague is one type of plague. It gets its name from the swollen lymph nodes (buboes) caused by the disease.
    • Called the Black Death, it killed millions of Europeans during the Middle Ages.
  • The other types of plague are:
    • Septicemic plague, which happens when the infection goes all through the body.
    • Pneumonic plague, which happens when the lungs are infected.
  • Plague can be a very severe disease in people, with a case-fatality ratio of 30% to 60% for the bubonic type, and is always fatal for the pneumonic kind when left untreated.
  • Symptoms: Bubonic plague symptoms include
    • Sudden high fever and chills.
    • Pains in the areas of the abdomen, arms, and legs.
    • Headaches.
    • Large and swollen lumps in the lymph nodes (buboes) that develop and leak pus.
  • Transmission:
    • Y. pestis is spread mostly by fleas on rodents and other animals. 
    • It is transmitted between animals and humans by the bite of infected fleas, direct contact with infected tissues, and inhalation of infected respiratory droplets.
  • The incubation period of bubonic plague is usually 2 to 8 days. 
  • Treatment:
    • It can be treated and cured with antibiotics.
    • Antibiotics that treat bubonic plague include Ciprofloxacin, levofloxacin, moxifloxacin, Gentamicin and Doxycycline.
    • It can be fatal if it’s not treated.

Q1) What are antibiotics?

Antibiotics are medicines that fight bacterial infections in people and animals. They work by killing the bacteria or by making it hard for the bacteria to grow and multiply.

Source: Rare Case Of Bubonic Plague In US, It Killed 50 Million In 14th Century

Update Icon
Latest UPSC Exam 2026 Updates

Date IconLast updated on March, 2026

UPSC Final Result 2025 is now out.

→ UPSC has released UPSC Toppers List 2025 with the Civil Services final result on its official website.

Anuj Agnihotri secured AIR 1 in the UPSC Civil Services Examination 2025.

UPSC Marksheet 2025 is now out.

UPSC Notification 2026 & UPSC IFoS Notification 2026 is now out on the official website at upsconline.nic.in.

UPSC Calendar 2026 has been released.

→ Check out the latest UPSC Syllabus 2026 here.

UPSC Prelims 2026 will be conducted on 24th May, 2026 & UPSC Mains 2026 will be conducted on 21st August 2026.

→ The UPSC Selection Process is of 3 stages-Prelims, Mains and Interview.

→ Prepare effectively with Vajiram & Ravi’s UPSC Prelims Test Series 2026 featuring full-length mock tests, detailed solutions, and performance analysis.

→ Enroll in Vajiram & Ravi’s UPSC Mains Test Series 2026 for structured answer writing practice, expert evaluation, and exam-oriented feedback.

→ Join Vajiram & Ravi’s Best UPSC Mentorship Program for personalized guidance, strategy planning, and one-to-one support from experienced mentors.

Shakti Dubey secures AIR 1 in UPSC CSE Exam 2024.

→ Also check Best UPSC Coaching in India

Vajiram Content Team
Vajiram Content Team
UPSC GS Course 2026
UPSC GS Course 2026
₹1,75,000
Enroll Now
GS Foundation Course 2 Yrs
GS Foundation Course 2 Yrs
₹2,45,000
Enroll Now
UPSC Mentorship Program
UPSC Mentorship Program
₹85000
Enroll Now
UPSC Sureshot Mains Test Series
UPSC Sureshot Mains Test Series
₹19000
Enroll Now
Prelims Powerup Test Series
Prelims Powerup Test Series
₹8500
Enroll Now
Enquire Now