West Nile Virus

What is West Nile Virus?

West Nile Encephalitis is an infection of the brain that is caused by a virus known as the West Nile Virus. First Image: West Nile VirusIdentified in Uganda in 1937, the Virus is commonly found in Africa, West Asia, and the Middle East. Encephalitis means inflammation of the brain. One of the causes of encephalitis is viral and bacterial infections, including viral infections transmitted by mosquitoes.

Since 1999 more than 30,000 people have been reported with West Nile Virus. More than 1,200 have died.  In 2011, 41 cases of west Nile Virus were confirmed by the CDC, of those 59% of patients developed neuroinvasive disease (involvement of the brain and nervous system), the most server form of West Nile Virus infection. CDC reports neuroinvasive disease was reported by 46 states and the District of Columbia. Among all people who become infected with West Nile Virus, most have mild symptoms that do not get reported. Less than 1% will actually develop severe neuroinvasive disease, according to CDC.

West Nile Virus FAQs

Preventing the spread of West Nile Virus