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West Nile virus

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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.
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Origin of West Nile virus

First recorded in 1935–40; named after the West Nile region of Uganda
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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Medical definitions for West Nile virus

West Nile virus
[ wĕst nīl ]

n.
A flavivirus that is transmitted by the bite of a mosquito and that can cause mild febrile illness as well as severe, sometimes fatal encephalitis and meningitis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for West Nile virus

West Nile virus
[ wĕst 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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