Plague Home > Plague

"Plague" is a term used to describe an infectious disease that affects humans and some animals. The Yersinia pestis bacteria are responsible for it, and actually cause three types of the disease: bubonic, septicemic, and pneumonic. If left untreated, the mortality rate is 50 to 90 percent. If treated early (typically with antibiotics), the rate drops to 15 percent.

What Is Plague?

Plague is an acute, infectious disease of humans, rodents, and ectoparasites (fleas and lice).
 

History

Throughout history, this disease has destroyed entire civilizations. In the 1300s, the "Black Death," as it was called, killed approximately one-third (20 to 30 million) of Europe's population. In the mid-1800s, it killed 12 million people in China. Thanks to better living conditions, antibiotics, and improved sanitation, it is rare these days, occurring in a few thousand people worldwide each year.
 
(Click History of Plague for more information.)
 

What Causes It?

Plague is caused by bacteria called Yersinia pestis. These bacteria are found mainly in rodents, particularly rats, and in the fleas that feed on them. Other animals and humans usually contract the bacteria from rodent or flea bites.
 
(Click Plague and Animals or What Caused the Plague? for more information.)
 

Types of Plague

A Yersinia pestis infection can cause one of three forms of plague:
 
  • Bubonic 
  • Septicemic
  • Pneumonic.
     
Depending on the circumstances, these different types may occur separately or in combination.
 
(Click Types of Plague for more information.)
 
Written by/reviewed by:
Last reviewed by: Arthur Schoenstadt, MD
Last updated/reviewed:
List of references (click here):
Other Articles in This eMedTV Presentation
Advertisement


Topics

Quicklinks

Related Channels

eMedTV Links
Copyright © 2006-2017 Clinaero, Inc.

eMedTV serves only as an informational resource. This site does not dispense medical advice or advice of any kind. Site users seeking medical advice about their specific situation should consult with their own physician. Click Terms of Use for more information.

This site complies with the HONcode standard for trustworthy health information:
verify here.