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Sunday 19 August 2012

Symmetric Polyarthritis Involving Knees


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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