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West Nile Virus in the San Gabriel Valley:
West Nile Virus Facts Jump to: Equine Disease & Avian Disease, WNv in California, Transmission & Symptoms, WNv Surveillance/Precautions/Control
West Nile virus is a flavivirus commonly found in Africa, West Asia, and the Middle East, that was first isolated from an adult woman in the West Nile District of Uganda in 1937, hence its name. It is closely related to St. Louis encephalitis virus which is also found in the United States, and known in the San Gabriel Valley. The virus can infect humans, birds, mosquitoes, horses and some other mammals. Subsequent outbreaks have occurred in Israel (1957), Egypt and France (early 1960’s), and more recently in Algeria (1994) Romania (1996-1997), the Czech Republic (1997), the Democratic Republic of the Congo (1998), Russia (1999), the United States (1999-2002), and Israel (2000) West Nile Virus in the United States WNV was first identified in New York City in September 1999. From 1999 through 2004, WNV has been documented in every state & the District of Columbia except for Alaska. Between1999-2006 there were 23,962 confirmed human cases and 950 deaths across the United States. For a current breakdown of cases/deaths by state please refer to: http://www.cdc.gov/ncidod/dvbid/westnile/surv&control.htm For a current map of WNV transmission, refer to: http://diseasemaps.usgs.gov/
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