Encephalitis is caused by :
Infections caused by HSV-1

Acute gingivo-stomatitis
Herpes labialis
Kerato-conjuctivitis 
Eczema herpeticum
Encephalitis
Dendritic keratitis

Ref : textbook of microbiology, C P Baveja, 5th edition , Pg no:444
HSV-I
EBV
Infectious mononucleosis
CMV