Human incidence of<unk>  in the United States, 1964-1998. In the United States an average of 128 cases of<unk>  are recorded annually. In temperate areas of the United States,<unk>  cases occur primarily in the late summer or early fall. In the southern United States where the climate is milder<unk>  can occur year-round.
Saint Louis encephalitis
La Crosse encephalitis
Powassan encephalitis
Japanese encephalitis
Eastern equine encephalitis
Rasmussen's encephalitis
Viliuisk encephalomyelitis
Tick-borne encephalitis