Borrelia turicatae is a bacterial species of the spirochaete class of the genus Borrelia. Borrelia turicatae is one of the relapsing fever spirochaetes, which are globally distributed yet understudied agents of tick-borne relapsing fever. The tick vector Ornithodoros turicata transmits B. turicatae, which causes relapsing fever, an arthropod-borne infection of humans and other mammals caused by different Borrelia species. B. turicatae is long and spiral-shaped, as is typical for all spirochaetes. It is a Gram negative bacterium and visible with light microscopy. Few epidemiological studies have been performed and little molecular data exist for B. turicatae and its arthropod vector O. turicata.