A 28-year-old woman is brought to hospital for a 1-week history of abnormal movements and sensation. She also reports decreased visual acuity in her right eye. Neurologic examination shows reduced motor function of the left leg, loss of pain and temperature in the right leg, and reduced vibration and proprioception of the left leg. Ophthalmologic examination shows visual acuity of 20/200 in the right eye; the left eye is normal. CSF analysis shows IgG oligoclonal bands. Which of the following is the most likely explanation for this patient’s findings?
A) Antibodies against aquaporin-4
B) Recent trauma
C) T cell attack against myelin basic protein
D) T cell attack against Schwann cells
E) Viral infection
