Symptoms of<unk> -infection The disease is most often biphasic. After an incubation period of approximately one week (range: 4–28 days) from exposure <unk>  bite) non-speciﬁc symptoms occurs. These symptoms are fever, malaise, headache, nausea, vomiting and myalgias that persist for about 5 days. Then, after approximately one week without symptoms, some of the infected develop neurological symptoms, i.e. meningitis, encephalitis or meningoencephalitis. Myelitis also occurs with or without encephalitis. Sequelae persists for a year or more in approximately one third of people who develop neurological disease. Most common long-term symptoms are headache, concentration difficulties, memory impairment and other symptoms of cognitive dysfunction. Mortality depends on the subtype of the virus. For the European subtype mortality rates are 0.5% to 2% for people who develop neurological disease. In dogs, the disease also manifests as a neurological disorder with signs varying from tremors to seizures and death. In ruminants, neurological disease is also present, and animals may refuse to eat, appear lethargic, and also develop respiratory signs.
Tick-borne encephalitis
Japanese encephalitis
Eastern equine encephalitis
Brain fever
Saint Louis encephalitis
Cryptic rabies
La Crosse encephalitis
Postvaccinal encephalitis