For determining duration of spirochetemia, we collected repeat blood samples from 9 PCR-positive B.
miyamotoi disease (Table 2) and used data for these samples to estimate the duration of spirochetemia. We excluded samples from patients who had started antimicrobial drug therapy before or at the same time as the blood tests and those from patients who had a time gap between blood samples >2 days.
We obtained data on the duration of spirochetemia, which contributes to the early diagnosis of B.
The 8 birds were monitored for spirochetemia for 7 days postinoculation by intravenous collection of blood from the wing's brachial vein and darkfield microscopic examination (x400) of the wet, unstained blood.
hermsii and examined for spirochetemia levels for the next 7 days.
T cells do not appear to have a major role in the resolution of spirochetemia (32).
Cutting edge: the spirochetemia of murine relapsing fever is cleared by complement-independent bactericidal antibodies.
burgdorferi in ticks and for enhancement of spirochetemia in mice.
hermsii produces cyclic spirochetemias that may achieve a density of [10.sup.8] bacteria/mL of blood.