• WNV Description & DistributionWest Nile virus is a mosquito-borne virus that primarily infects and multiplies in birds.
• History of West Nile VirusWest Nile virus was first discovered Uganda in 1937, and has recently spread beyond its traditional boundaries to Europe and the United States.
• WNV Transmission and DevelopmentWest Nile Virus is carried by birds and is transmitted through the bite of an infected mosquito.
• WNV Clinical Signs and PathologyThe majority of humans infected with West Nile virus will have no signs of illness or will experience a mild flu-like illness.
• WNV DiagnosisDiagnosis generally begins with the observation of clinical signs consistent with West Nile virus and is confirmed by laboratory testing.
• WNV Treatment and ControlThere is currently no specific treatment beyond supportive care for West Nile virus.
• WNV SignificanceMembers of the corvid family (crows, blue jays and ravens) are most severely impacted by West Nile virus, although it can infect and cause illness in horses,humans and other birds and mammals.