<unk>  is a mild to moderate, though sometimes fatal, infection of the central nervous system.<unk>  belongs to the Group IV positive-sense ssRNA virus within the Togaviridae family of viruses, and the genus Alphavirus.<unk>  virus is usually transmitted via mosquitos to the human host, primarily Culex melanoconion or Aedes.<unk>  virus must be differentiated from other diseases that cause fever, headache, seizures, and altered mental status. Prognosis for<unk>  is generally good; less than 1% of patients infected with the<unk>  virus present with symptoms. Symptomatic patients often recover within 2-3 weeks of infection. The case-fatality rate of<unk>  is approximately 0.7. If possible, a detailed and thorough history from the patient is necessary. If the patient is female, a pregnancy test should be administered to monitor for potential miscarriage.<unk>  is usually asymptomatic. The diagnostic method of choice for<unk>  is laboratory testing. There is no treatment for<unk> ; the mainstay of therapy is supportive care. There is a vaccination approved for limited use for<unk> , though its effectiveness is often questioned.
Venezuelan equine encephalitis
Western equine encephalitis
Eastern equine encephalitis
Tick-borne encephalitis
St. Louis encephalitis
Tick borne encephalitis
Crimean-Congo hemorrhagic fever
Japanese encephalitis