Per CDC:
Key points
Plague is a potentially life-threatening disease caused by the bacterium, Yersinia pestis.
Plague occurs naturally in areas of the western United States, where it circulates among wild rodents and other animals.
Plague can be cured with antibiotics, but treatment must be given quickly.
Plague symptoms depend on how the patient was infected.
The most common forms of plague are bubonic, pneumonic, and septicemic.
To learn more visit: About Plague | Plague | CDC