Borrelia hermsii

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Borrelia hermsii
Borrelia hermsii (green) on red blood cells
Scientific classification edit
Domain: Bacteria
Phylum: Spirochaetota
Class: Spirochaetia
Order: Spirochaetales
Family: Borreliaceae
Genus: Borrelia
B. hermsii
Binomial name
Borrelia hermsii
(Davis, 1942) Steinhaus, 1946

Borrelia hermsii is a spirochete bacterium that has been implicated as a cause of tick-borne relapsing fever.[1][2][3] It is spread by the soft-bodied tick Ornithodoros hermsi.[4]

Borrelia hermsii in the blood of one individual ( stained with rabbit hyper-immune serum and anti-rabbit fluorescein isothiocyanate).


  1. Schwan, Tom G.; Policastro, Paul F.; Miller, Zachary; Thompson, Robert L.; Damrow, Todd; Keirans, James E. (September 2003). "Tick-borne Relapsing Fever Caused by Borrelia hermsii, Montana". Emerging Infectious Diseases. 9 (9): 1151–1154. doi:10.3201/eid0909.030280. PMC 3016790. PMID 14519254.
  2. "eMedicine - Tick-Borne Diseases, Relapsing Fever : Article by Jonathan A Edlow". Archived from the original on 2008-10-06. Retrieved 2008-11-09.
  3. Dai Q, Restrepo BI, Porcella SF, Raffel SJ, Schwan TG, Barbour AG (June 2006). "Antigenic variation by Borrelia hermsii occurs through recombination between extragenic repetitive elements on linear plasmids". Molecular Microbiology. 60 (6): 1329–43. doi:10.1111/j.1365-2958.2006.05177.x. PMC 5614446. PMID 16796672.
  4. Schwan TG, Raffel SJ, Schrumpf ME, et al. (July 2009). "Tick-borne relapsing fever and Borrelia hermsii, Los Angeles County, California, USA". Emerging Infectious Diseases. 15 (7): 1026–1031. doi:10.3201/eid1507.090223. PMC 2744237. PMID 19624916.