A 43-year-old
executive presents to a physician with chronic, symmetric polyarthritis
involving the knees. The man gives a history of having developed an extensive
rash after a deer hunting trip in Connecticut several years earlier. He recalls
that he felt "sick" at the time, and developed knee pain that prevented
him from climbing stairs for several months, but then partially resolved.
Which
of the following organisms is most likely etiologically related to the patient's
arthritis?
A. Fungus.
B.
Gram-negative cocci.
C.
Gram-negative rod.
D.
Gram-positive cocci.
E.
Spirochete.
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