An Elderly Immigrant from the Middle East Presents to Your

An elderly immigrant from the Middle East presents to your office complaining of numbness and tingling of his hands and feet.  He was diagnosed with pulmonary tuberculosis several months ago and is currently receiving isoniazid and rifampin.  Neurologic testing demonstrates sensory ataxia and decreased pain sensation in the distal extremities.  This patient's condition is most likely caused by:

A) Immune-mediated demyelinization
B) Bacterial toxin-mediated axonal damage
C) Drug-mediated toxic neuron loss
D) Vitamin deficiency
E) Diabetic neuropathy

Correct Answer:

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