Infection of brain parenchyma  of the temporal lobes and inferior frontal lobe causing distinct neurologic abnormality
Pathophysiology
Gray matter is predominantly affected (cognitive / psychiatric signs, lethargy, seizure)
Gray matter is predominantly affected (cognitive / psychiatric signs, lethargy, seizure)
HSV
HZV
EBV
CMV
Rabies
Arboviruses (West Nile, St. Louis equine) account for 50% of cases
Encephalitis
SAH
Meningitis 
Lyme disease
Meningitis
Brain abscess
Meningoencephalitis
Bacterial endocarditis