Borrelia recurrentis is a species of Borrelia, a spirochaete bacterium associated with relapsing fever.

[4] B. recurrentis DNA was found in 23% of head lice from patients with louse-borne relapsing fever in Ethiopia.

Whether head lice can transmit these bacteria from one person to another remains to be determined.

[4] It is notable for its ability to alter the proteins expressed on its surface, which causes the "relapsing" characteristic of relapsing fever.

This Spirochaete-related article is a stub.