What is the causative agent for Plague?

The causative agent of plague is Yersinia pestis, a type of bacterium. This organism is primarily responsible for the infections that lead to the various forms of plague, which include bubonic, septicemic, and pneumonic plague. Yersinia pestis is transmitted to humans through bites from infected fleas, particularly the Xenopsylla cheopis flea, or through direct contact with infected animals or respiratory droplets from an infected person.

Recognizing Yersinia pestis as the causative agent emphasizes the importance of understanding the specific microorganisms that contribute to infectious diseases. Its identification has been crucial in developing treatment and prevention strategies for plague outbreaks. The study of this bacterium also provides insights into the history of pandemics, particularly the Black Death in the 14th century.