Tick-borne relapsing fever is caused by numerous Borrelia species maintained in nature by Ornithodoros tick-mammal cycles. Serological confirmation is based on either an immunofluorescence assay or an enzyme-linked immunosorbent assay using whole cells or sonicated Borrelia hermsii as the antigen. However, antigenic variability of this bacterium's outer surface proteins and antigens shared with...

Differentiation of endemic East African tick-borne relapsing fever Borrelia duttonii spirochetes from epidemic louse-borne relapsing fever (LBRF) B. recurrentis spirochetes into different species has been questioned. We assessed a noncoding intragenic spacer (IGS) region to compare genotypes found in clinical samples from relapsing fever patients. Although IGS typing was highly discriminatory a...

from his investigations that the relapsing fever of Panama is distinct from the analogous fever of Africa Europe and Asia, although belonging to the same class. The micro-organism causing | the local relapsing fever belongs to the group Sp. obermeieri, Sp. duttoni, and bp. carten. lhe natural mode of infection has not been definitely established so far. Sarcosporidiosis.?(With Report of a case 111

References 1. Parola P, Diatta G, Socolovschi C, Mediannikov O, Tall A, Bassene H, et al. Tick-borne relapsing fever borreliosis, rural Senegal. Emerg Infect Dis. 2011;17:883–5. 2. Elbir H, Raoult D, Drancourt M. Relapsing fever borreliae in Africa. Am J Trop Med Hyg. 2013;89:288–92. http://dx.doi.org/ 10.4269/ajtmh.12-0691 3. Wilting KR, Stienstra Y, Sinha B, Braks M, Cornish D, Grundmann H. L...

Tick-borne relapsing fever is characterized by recurring fevers separated by afebrile periods and is accompanied by nonspecific constitutional symptoms. It occurs after a patient has been bitten by a tick infected with a Borrelia spirochete. The diagnosis of tick-borne relapsing fever requires an accurate characterization of the fever and a thorough medical, social, and travel history of the pa...

In Africa, relapsing fevers caused by ectoparasite-borne Borrelia species are transmitted by ticks, with the exception of Borrelia recurrentis, which is a louse-borne spirochete. These tropical diseases are responsible for mild to deadly spirochetemia. Cultured Borrelia crocidurae, Borrelia duttonii, and Borrelia hispanica circulate alongside at least six species that have not yet been cultured...

A 49-year-old healthy female presented to the emergency department with a headache, fever to 103°F, mild myalgia, heart rate of 119 bpm, and blood pressure of 80/40 mm Hg. Past medical history was unremarkable, no drug allergies or current medications, except for a recent vacation in eastern Washington state. The complete blood count showed a white blood cell count of 12.5 3 10E9/L (mild leukoc...