West Nile fever


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Related to West Nile fever: West Nile encephalitis

West Nile fe·ver

febrile illness caused by West Nile virus (q.v.).

West Nile fever

West Nile meningoencephalitis Infectious disease An acute, mosquito-borne flaviviral infection endemic–rarely, epidemic–in the Near East, Africa, former Soviet Union, India Clinical After a 3-6 day incubation, children present with a nonspecific febrile illness; older Pts develop a mild dengue-like disease with fever, rash that clears without desquamation, frontal headaches, orbital pain, backaches, myalgia, anorexia, lymphadenopathy, leukopenia, sore throat and possibly meningoencephalitis in the elderly; usually it is self-limited, and resolves in a wk. See Dengue fever.

West Nile fe·ver

(west nīl fē'vĕr)
Infection by West Nile virus, which is spread by mosquitoes. In mild infections, fever, headache, and muscle ache may last a few days. In severe infections, encephalitis, hyperpyrexia, stiff neck, convulsions, paralysis, and coma may last several weeks; resulting deficits may become permanent.

West Nile fever

A flavivirus arthropod-borne (arboviral) infection endemic mainly in birds and spread by culicine mosquitoes. The disease causes a feverish illness mainly affecting young children. There is headache muscle pain, enlarged lymph nodes and a rash of slightly raised spots. Widespread epidemics in the USA in 2002-the first reported in the Western hemisphere-featured a high percentage of cases of encephalitis, especially in elderly patients, with a mortality of about 9 per cent. New features were noted, including a poliomyelitis-like involvement of anterior horn cells with muscle paralysis.

West Nile,

a province in Uganda where the virus was first discovered in 1937.
West Nile encephalitis virus - a Flavivirus in the family Flaviviridae. Synonym(s): West Nile virus
West Nile fever - a febrile illness caused by West Nile virus, a member of the family Flaviviridae, and characterized by headache, fever, maculopapular rash, myalgia, lymphadenopathy, and leukopenia; spread by Culex mosquitoes.
West Nile virus - Synonym(s): West Nile encephalitis virus
References in periodicals archive ?
Infection with WNV is either asymptomatic (no symptoms) in around 80 per cent of infected people, or can lead to West Nile fever or severe West Nile disease.
Other insect-borne diseases such as the tropical West Nile Fever could also be seen in the UK.
We determined case severity (West Nile neuroinvasive disease [WNND] and West Nile fever [WNF]) by using established criteria (4) and calculated attack rates by demographic characteristics by using population estimates for 2014 (5).
Contract notice: Model extension for the tool to appraise and compare vector control strategies against West Nile fever in Europe.
Dengue fever and West Nile fever are mosquito-borne diseases that affect hundreds of millions of people worldwide each year, but there is no vaccine against either of the related viruses.
When someone is infected with West Nile virus, they will typically have one of three outcomes, according to the (http://www.cdc.gov/ncidod/dvbid/westnile/qa/symptoms.htm) Centers for Disease Control and Prevention : No symptoms, West Nile fever, or severe West Nile disease, such as meningitis or encephalitis.
Of the 23 PVDs, seven persons (median age: 38 years [range: 18-79 years]) subsequently had West Nile fever.
In the lab, a malaria vaccine showed promise (162: 99), and a vaccine fashioned from pieces of the viruses that cause dengue fever and West Nile fever protected mice against West Nile infections (161: 164).
Other outbreaks, such as West Nile fever in Queens, New York, in 1999 or drug-resistant malaria in Thailand in 1982, are not as well known to the general public.
Indeed, a considerable increase in the spread of exotic invasive mosquito species has been observed in Europe since the late 1990s and it has been accompanied by the emergence and/or re-emergence in several EU countries of forgotten mosquito-borne diseases such as chikungunya, dengue, West Nile fever and malaria.
Notable human diseases caused by RNA viruses include SARS, influenza, hepatitis C, West Nile fever, the common cold and poliomyelitis.
Human WNV disease cases are classified as 1) WNND (i.e., meningitis, encephalitis, or acute flaccid paralysis); 2) West Nile fever (WNF), which is symptomatic WNV disease that does not affect the nervous system; 3) other clinical illness; or 4) unspecified (i.e., unknown) illness.

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