Borrelia recurrentis

Borrelia recurrentis
Photomicrographic view of a culture specimen showing Borrelia recurrentis bacteria
Scientific classification
Domain: Bacteria
Kingdom: Pseudomonadati
Phylum: Spirochaetota
Class: Spirochaetia
Order: Spirochaetales
Family: Borreliaceae
Genus: Borrelia
Species:
B. recurrentis
Binomial name
Borrelia recurrentis
(Lebert, 1874) Bergey et al., 1925

Borrelia recurrentis is a species of Borrelia, a spirochaete bacterium associated with relapsing fever. B. recurrentis is usually transmitted from person to person by the human body louse. Since the 1800s, the body louse has been known as its only known vector.

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.

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