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U.S. West Nile virus (WNV) neuroinvasive disease incidence as of Sep 4, 2012. The West Nile virus quickly spread across the United States after the first reported cases in Queens, New York, in 1999. The virus is believed to have entered in an infected bird or mosquito, although there is no clear evidence.
West Nile virus. West Nile fever is an infection by the West Nile virus, which is typically spread by mosquitoes. [53] In about 80% of infections people have few or no symptoms. [54] About 20% of people develop a fever, headache, vomiting, or a rash. [53]
The first cases of West Nile disease in the United States occurred in 1999 in New York. In the first three years only a small number of human cases were diagnosed, all in the Eastern or Southern U.S. (149 cases and 19 deaths, 1999–2001).
West Nile virus is now endemic in Africa, Europe, the Middle East, west and central Asia, Oceania (subtype Kunjin), and most recently, North America and is spreading into Central and South America. [95] Outbreaks of West Nile virus encephalitis in humans have occurred in Algeria (1994), Romania (1996 to 1997), the Czech Republic (1997), Congo ...
West Nile virus was accidentally introduced into the US in 1999 and by 2003 had spread to almost every state with over 3,000 cases in 2006. Other species of Aedes as well as Culex and Culiseta are also involved in the transmission of disease. [citation needed] Myxomatosis is spread by biting insects, including mosquitoes. [10]
West Nile virus (WNV) is a mosquito-borne virus first identified in the United States in 1999. It is most commonly found in Africa, Europe, the Middle East and North America.
An example of person-to-person transmission is the herpes simplex virus, which is transmitted by means of intimate physical contact. [13] An example of arboviral transmission is the West Nile virus, which usually is incidentally transmitted to people from the bites of Culex mosquitos, especially Culex pipiens. [14]
West Nile Virus (WNV) surveillance and recording mechanisms vary in quality between countries in Europe, leading to inconsistencies in data detection. [9] Furthermore, there is a lack of surveillance systems and health policies in place to effectively manage outbreaks. [9]