A 15-yr-old girl had a seizure this morning and was rushed to the hospital. On examination, her temperature is 40C and she had no nuchal rigidity. CT scan revealed no abnormality. A spinal tap was done and the protein and glucose were normal. Gram stain of the CSF showed no organisms and no PMNs. SHe was treated with various antibiotics but became comatose and died 2 days later. The routine blood culture and spinal fluid grew no organism. On autopsy of the brain, eosinophilic inclusion bodies were seen in the cytoplasm of neurons. Which of the following is the MOST likely cause?
a. Prions
b. JC virus
c. Rabies virus
d. Parvovirus B19
e. Herpes simplex virus type 1