The presence of spirochetes in smears of peripheral blood, bone marrow, or cerebrospinal fluid in a symptomatic person is diagnostic of<unk>  fever.
The diagnosis of<unk>  fever is confirmed by the identification of the borrelia in the patient's blood under microscopy. Laboratory tests may also reveal mild anemia with normal to increased leukocyte count.  Biochemistry may reveal Mildly increased serum bilirubin and  hepatic aminotransferase level, increased urea nitrogen, creatinine, Elevated ESR.
Slightly prolonged coagulation tests, PT and APTT, as well as proteinuria or hematuria, are also common
Relapsing fever laboratory findings
Trench fever laboratory findings
Typhoid fever laboratory findings
Scrub typhus laboratory findings
Paratyphoid fever laboratory findings
Malaria laboratory findings
Typhus laboratory findings
Relapsing fever other diagnostic studies