West Nile Virus (WNV) causes bird disease that is transmitted by mosquitoes. Humans, horses and other mammals may also be infected. In humans the most serious manifestation of WNV infection is encephalitis (inflammation of the brain).
West Nile surveillance and education in South Dakota is funded by a CDC grant to the Public Health Laboratory. Since 2004, the state has also provided a grant program for cities, counties and tribes to support local mosquito control programs.
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