Patient is 49 yo F who presents to ED with few days of fever (T max 102F), progressive headache, neck stiffness. Patient denies any travel, rashes, sick contacts. Pt complains she can’t be in a well lit room or go outside without pain. You have a high suspicion for meningitis and so perform an LP.
CSF shows as follows:
WBC 100/mm3 (60% N, 35%L)
Glucose 40 (serum glucose 100)
Aside from a gram stain and culture, are there any other tools to help differentiate between viral and bacterial meningitis?