St. Louis encephalitis

A disease caused by a virus (first observed in Illinois in 1932) transmitted from birds to the common Culex mosquito to people. St. Louis encephalitis occurs typically in the summer and early fall. In the U.S., the virus is rarely found outside the Southeast. Signs and symptoms include the sudden onset of drowsiness, headache and nausea (due to the encephalitis), pain in the abdomen, a rash, and swollen glands (lymphadenopathy). These features are usually but not always mild. The fatal cases tend to involve infants and small children (under age 5), the aged, and people with an impaired immune system. The virus is closely related to other flaviviruses including those responsible for West Nile encephalitis, Japanese encephalitis and Murray Valley encephalitis.

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a form of epidemic encephalitis caused by a flavivirus; it is similar to western equine encephalomyelitis clinically, occurring in late summer and early fall and transmitted usually by mosquitoes of the genus Culex. It ranges from an abortive type of infection to severe disease and affects the elderly most often. Called also e. C.

Medical dictionary. 2011.

Look at other dictionaries:

  • St. Louis Encephalitis — Taxobox | color=violet name = St. Louis Encephalitis Virus image caption = virus group = iv familia = Flaviviridae genus = Flavivirus species = St. Louis Encephalitis Virus St. Louis Encephalitis is a disease caused by the mosquito borne St.… …   Wikipedia

  • saint louis encephalitis — noun Usage: usually capitalized S&L Etymology: so called from its having first occurred in epidemic form in St. Louis in 1933 : a No. American viral encephalitis * * * Saint Louis encephalitis, = St. Louis encephalitis. (Cf. ↑St) …   Useful english dictionary

  • Saint Louis encephalitis — Saint Lou·is encephalitis .lü əs n a No. American encephalitis that is caused by a single stranded RNA virus of the genus Flavivirus (species St. Louis encephalitis virus) transmitted by several mosquitoes of the genus Culex …   Medical dictionary

  • Saint Louis encephalitis — noun Etymology: Saint Louis, Missouri Date: 1934 a North American encephalitis that is caused by a flavivirus (species Saint Louis encephalitis virus of the genus Flavivirus) transmitted by several culex mosquitoes …   New Collegiate Dictionary

  • St Louis encephalitis — noun a form of viral encephalitis which can be fatal and is transmitted by mosquitoes. Origin from the name of St Louis in Missouri, US …   English new terms dictionary

  • St. Louis encephalitis — …   Useful english dictionary

  • St. Louis encephalitis virus — a virus of the genus Flavivirus, antigenically related to Japanese encephalitis virus, that causes St. Louis encephalitis; transmitted by mosquitoes …   Medical dictionary

  • Encephalitis — is an acute inflammation of the brain, commonly caused by a viral infection. It can be caused by a bacterial infection such as bacterial meningitis spreading directly to the brain (primary encephalitis), or may be a complication of a current… …   Wikipedia

  • Encephalitis, arboviral — Encephalitis (which is inflammation of the brain) that is due to infection by an arbovirus (an arthropod borne virus). The arboviruses are maintained through transmission between susceptible vertebrate animals by arthropods (such as mosquitoes… …   Medical dictionary

  • Encephalitis, St. Louis — A disease caused by a virus (first observed in Illinois in 1932) transmitted from birds to the common Culex mosquito to people. St. Louis encephalitis occurs typically in the summer and early fall. In the U.S., the virus is rarely found outside… …   Medical dictionary

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