Summary: Ehrlichiosis is a bacterial infection transmitted by the bite of a tick.Ehrlichiosis is caused by bacteria that belong to the family called rickettsiae. Rickettsial bacteria cause a number of serious diseases worldwide, including Rocky Mountain spotted fever and typhus. All of these diseases are spread to humans by a tick, flea, or mite bite.
Reference Material:
https://medlineplus.gov/ency/article/001381.htm