Infection is transmitted by the bite of an infected flea
or exposure to infected material through a break in the skin.
Bubonic plague cannot be transmitted from person to person.
If bubonic plague is not treated, the bacteria can spread
through the bloodstream and infect the lungs, causing a secondary
infection of pneumonic or septicemic plague.
Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, USA
Tel: 404-639-3311 • Public Inquiries: 800-CDC-INFO • TTY: 888-232-6348