West Nile Virus
West Nile Virus (WNV) was first recognized in the
United States in 1999 as the cause of severe and
fatal human illness in metropolitan New York City.
West Nile Virus is commonly found in Africa, West
and Central Asia, and the Middle East. It is not
known how the virus was first introduced into the
United States, but since the initial appearance it
has spread rapidly, and by 2001 was found throughout
the eastern half of the country. The principal
transmission cycle of West Nile Virus involves
several species of mosquitoes and various species of
birds.
In 2002, there were over 4156 confirmed human cases
of WNV in the US with 284 deaths. As of September
12, 2003, there have been 3,370 human cases and 65
deaths reported to the CDC.
West Nile Virus Activity as of August 6, 2003 (MMWR)
http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5231a6.htm
West Nile Virus Related Links and Information
WNV Publications and Downloads
http://www.cdc.gov/ncidod/dvbid/westnile/publications.htm
Guidelines for Clinicians
http://www.cdc.gov/ncidod/dvbid/westnile/clinicians/
Laboratory Guidelines
http://www.cdc.gov/ncidod/dvbid/westnile/lab_guidance.htm
Prevention Brochure
WestNileInfoCard2003.pdf
Presentations from the 2002 WNV National Conference
(February 2003)
http://www.cdc.gov/ncidod/dvbid/westnile/conf/February_2003.htm
National and state maps including county-level data
http://westnilemaps.usgs.gov/
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