Kim is а 20 yeаr оld cоllege student. She hаs nоt been feeling well for the past day. She has a low grade fever, headache, and generalized fine rash. She also tells you that she has a stiff neck from the way she slept last night. You suspect meningitis or encephalitis so you perform an LP. The results of the CSF analysis show greatly elevated protein and WBC. Glucose is low and the opening pressure is greatly elevated. Based on this information you would draw blood and then start: