RT Book, Section A1 Barbour, Alan G. A2 Kasper, Dennis L. A2 Fauci, Anthony S. SR Print(0) ID 1141410008 T1 RELAPSING FEVER T2 Harrison's Infectious Diseases, 3e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259835971 LK accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141410008 RD 2024/04/24 AB Relapsing fever is caused by infection with any of several species of Borrelia spirochetes. Physicians in ancient Greece distinguished relapsing fever from other febrile disorders by its characteristic clinical presentation: two or more fever episodes separated by varying periods of well-being. In the nineteenth century, relapsing fever was one of the first diseases to be associated with a specific microbe by virtue of its characteristic laboratory finding: the presence of large numbers of spirochetes of the genus Borrelia in the blood.