Posted: July 16th, 2017
A patient who recently returned from a camping trip in Montana is
hospitalized with high fever and prostration that recurs every 5 to 7
days. Loosely coiled spiral-shaped organisms 10 to 20 mm in length
are noted in a Wright-stained smear of the patient’s blood. Which of
the following is the most probably etiologic agent?
A. Leptospira interrogans
B. Spirillum minor
C. Borrelia parkeri
D. Treponema pallidum
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