Microbial Diseases A to Z | Disease Home Page | Bio 406 Home Page | MicroWorld

Relapsing Fever


Relapsing fever is caused by members of the genus Borrelia. There are 2 forms of relapsing fever - epidemic, transmitted by the human body louse, and endemic, spread by ticks. Endemic RF is a zoonotic disease. Relapses occur because these spirochaetes alter their cell surface proteins through antigenic shift.


Epidemic (louse-borne) relapsing fever
Endemic (tick-borne) relapsing fever