Borrelia recurrentis

Hello! Hello! Hello!
I'm B. recurrentis.
I'm also a spirochete bacteria.
I'm carried by the common body louse.

I cause louse-borne relapsing fever.
I cause fever, shaking, delirium and muscle ache.
I make you sick for a few days and go away.
Then I come back again for a while.
I come back over and over again, sometimes for weeks.