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West Nile virus

noun, Pathology.
an illness caused by a chiefly mosquito-borne virus of the genus Flavivirus, characterized in a small percentage of infected persons by fever, headache, muscle weakness, and sometimes encephalitis or meningitis.
the virus that causes this illness. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Contemporary definitions for West Nile virus

a type of flavirus mainly infecting birds and mosquitos but also transmitted by them to humans and other animals, causing flu-like symptoms (West Nile fever) which may lead to encephalitis and meningitis and having no known treatment's 21st Century Lexicon
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West Nile virus in Medicine

West Nile virus (wěst nīl)
A viral disease of varying severity, occurring in Africa, Asia, the Mediterranean, and parts of North America, that is transmitted by a culex mosquito.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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West Nile virus in Science
West Nile virus
  (wěst nīl)   
An infectious disease caused by a virus of the genus Flavivirus, occurring in Africa, Asia, the Mediterranean, and parts of North America. The infection is transmitted by a mosquito and can cause mild illness as well as severe, sometimes fatal encephalitis and meningitis.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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